User contributions for Cesco
Jump to navigation
Jump to search
19 October 2017
- 17:2217:22, 19 October 2017 diff hist +70 MeoW →BOM
14 October 2017
- 11:4611:46, 14 October 2017 diff hist 0 N File:Dipole-loading-coil.jpg No edit summary current
13 October 2017
- 19:5119:51, 13 October 2017 diff hist +33 Radio →T-antenna = current
- 19:4919:49, 13 October 2017 diff hist +66 Radio →Antenna
- 19:4719:47, 13 October 2017 diff hist 0 N File:T-antenna-coil-autotrafo.gif No edit summary current
- 19:4519:45, 13 October 2017 diff hist +59 Radio →Antenna
- 19:4319:43, 13 October 2017 diff hist 0 N File:Antenna verticale.jpg No edit summary current
- 13:3213:32, 13 October 2017 diff hist −4 Tortora →Schede di rete
- 13:3113:31, 13 October 2017 diff hist +93 Tortora →Schede di rete
- 13:2813:28, 13 October 2017 diff hist +58 Tortora →Schede di rete
- 13:2613:26, 13 October 2017 diff hist +345 Tortora →Schede di rete
- 13:0013:00, 13 October 2017 diff hist 0 Tortora →Schede di rete
8 October 2017
- 22:0222:02, 8 October 2017 diff hist +62 MeoW →Trasformatore di uscita
2 October 2017
- 21:2921:29, 2 October 2017 diff hist 0 File:Meow.sch.svg Nzasch uploaded a new version of File:Meow.sch.svg
29 September 2017
- 17:1917:19, 29 September 2017 diff hist +33 MeoW →Trasformatore di uscita
- 17:0417:04, 29 September 2017 diff hist +112 MeoW →Regolazione
- 17:0317:03, 29 September 2017 diff hist 0 N File:Am-modulation-index.gif No edit summary current
- 17:0017:00, 29 September 2017 diff hist +214 MeoW →Regolazione
- 14:3114:31, 29 September 2017 diff hist +50 Sdaz →Passa Banda
- 13:0613:06, 29 September 2017 diff hist +745 MeoW →Riflettometro
27 September 2017
- 19:3719:37, 27 September 2017 diff hist 0 File:Meow.sch.svg Cesco uploaded a new version of File:Meow.sch.svg
- 18:3918:39, 27 September 2017 diff hist +37 MeoW →BOM
- 18:3718:37, 27 September 2017 diff hist +201 MeoW →Modulatore
- 18:3318:33, 27 September 2017 diff hist +62 MeoW →BOM
- 18:3018:30, 27 September 2017 diff hist −11 MeoW →BOM
- 18:1318:13, 27 September 2017 diff hist 0 File:Meow pa pcb.svg Cesco uploaded a new version of File:Meow pa pcb.svg
- 00:5200:52, 27 September 2017 diff hist +18 MeoW →Trasformatore di ingresso
- 00:5100:51, 27 September 2017 diff hist +1 MeoW →Trasformatore di ingresso
26 September 2017
- 17:3417:34, 26 September 2017 diff hist +60 Sdaz →Passa Banda
- 17:3117:31, 26 September 2017 diff hist +73 Sdaz →Passa Banda
- 17:2117:21, 26 September 2017 diff hist +68 Sdaz →Passa Banda
- 17:1817:18, 26 September 2017 diff hist +89 Sdaz →Passa Banda
- 17:1517:15, 26 September 2017 diff hist 0 N File:Bpf-6p.gif No edit summary current
- 17:1017:10, 26 September 2017 diff hist +66 Sdaz →Passa Banda
- 16:5616:56, 26 September 2017 diff hist +51 Sdaz →Passa Banda
- 16:5116:51, 26 September 2017 diff hist +225 Sdaz No edit summary
- 16:1716:17, 26 September 2017 diff hist +133 Sdaz No edit summary
25 September 2017
- 16:3216:32, 25 September 2017 diff hist +14 MeoW →BOM
- 16:0916:09, 25 September 2017 diff hist +45 MeoW →BOM
- 16:0516:05, 25 September 2017 diff hist +31 MeoW →BOM
- 16:0216:02, 25 September 2017 diff hist +33 MeoW →BOM
- 16:0216:02, 25 September 2017 diff hist +48 MeoW →Trasformatore di uscita
- 15:4815:48, 25 September 2017 diff hist +2 MeoW →Trasformatore di ingresso
- 12:5812:58, 25 September 2017 diff hist +48 File:Meow pa pcb.svg No edit summary
- 12:5712:57, 25 September 2017 diff hist 0 File:Meow pa pcb.svg Cesco uploaded a new version of File:Meow pa pcb.svg
- 12:5412:54, 25 September 2017 diff hist +22 MeoW →BOM
- 12:5212:52, 25 September 2017 diff hist 0 File:Meow.sch.svg Cesco uploaded a new version of File:Meow.sch.svg
20 September 2017
- 16:0016:00, 20 September 2017 diff hist +17 MeoW →Trasformatore di ingresso
19 September 2017
- 16:4016:40, 19 September 2017 diff hist 0 File:Meow pa pcb.svg Cesco uploaded a new version of File:Meow pa pcb.svg
- 16:3016:30, 19 September 2017 diff hist +4 File:Meow pa pcb.svg No edit summary
- 16:1616:16, 19 September 2017 diff hist +1 Cacatua No edit summary
16 September 2017
- 17:0817:08, 16 September 2017 diff hist +163 MeoW →BOM
- 17:0417:04, 16 September 2017 diff hist +61 MeoW →Punti di test
- 16:5916:59, 16 September 2017 diff hist +149 MeoW →BOM
15 September 2017
- 18:3918:39, 15 September 2017 diff hist +32 MeoW →DDS
- 18:3518:35, 15 September 2017 diff hist +10 MeoW →DDS
- 18:3518:35, 15 September 2017 diff hist 0 MeoW →DDS
- 18:3418:34, 15 September 2017 diff hist −21 MeoW →DDS
- 18:3218:32, 15 September 2017 diff hist +5 Ondeggiatore →Modulo con Rset esposta
- 18:3018:30, 15 September 2017 diff hist +34 Ondeggiatore →Modulo con Rset esposta
- 18:2918:29, 15 September 2017 diff hist 0 N File:9850 DDS rset.jpg No edit summary current
- 18:2218:22, 15 September 2017 diff hist +1 MeoW →uC controllo
- 18:2118:21, 15 September 2017 diff hist +16 MeoW →uC controllo
- 18:2018:20, 15 September 2017 diff hist +17 MeoW →Pretrattamento audio
- 18:1918:19, 15 September 2017 diff hist −50 MeoW No edit summary
- 18:1618:16, 15 September 2017 diff hist −947 MeoW No edit summary
- 18:1318:13, 15 September 2017 diff hist +17 MeoW →MOSFET
- 18:1218:12, 15 September 2017 diff hist +54 MeoW →DDS
- 18:1018:10, 15 September 2017 diff hist +417 MeoW No edit summary
- 17:1917:19, 15 September 2017 diff hist −1 Amplificatori No edit summary
14 September 2017
- 20:0020:00, 14 September 2017 diff hist +35 MeoW →uC controllo
- 19:3519:35, 14 September 2017 diff hist +1 MeoW →BOM
- 19:3419:34, 14 September 2017 diff hist +75 MeoW →BOM
- 19:3319:33, 14 September 2017 diff hist −116 MeoW →DDS
- 19:3219:32, 14 September 2017 diff hist +16 MeoW →uC controllo
- 18:4518:45, 14 September 2017 diff hist +367 MeoW →Stadio pilota
- 17:4517:45, 14 September 2017 diff hist +25 MeoW →Amplificatore lineare
13 September 2017
- 21:1121:11, 13 September 2017 diff hist +22 Cacatua No edit summary
- 21:1121:11, 13 September 2017 diff hist +9 N File:Cacatua.png No edit summary current
- 20:5920:59, 13 September 2017 diff hist +145 MeoW →uC controllo
- 14:3014:30, 13 September 2017 diff hist +29 MeoW →Riflettometro
- 14:2814:28, 13 September 2017 diff hist +41 MeoW →BOM
- 14:2614:26, 13 September 2017 diff hist −6 MeoW →Amplificatore lineare
- 14:2414:24, 13 September 2017 diff hist +16 MeoW →Amplificatore lineare
- 14:2214:22, 13 September 2017 diff hist 0 MeoW →BOM
12 September 2017
- 16:2416:24, 12 September 2017 diff hist +35 MeoW →BOM
- 16:2216:22, 12 September 2017 diff hist +92 MeoW →Riflettometro
- 16:1516:15, 12 September 2017 diff hist +122 MeoW →Riflettometro
- 12:5612:56, 12 September 2017 diff hist 0 MeoW →BOM
- 12:4912:49, 12 September 2017 diff hist +91 MeoW →BOM
- 12:1312:13, 12 September 2017 diff hist −105 MeoW →BOM
- 12:0312:03, 12 September 2017 diff hist +590 MeoW →Amplificatore lineare
11 September 2017
- 19:4319:43, 11 September 2017 diff hist 0 File:Meow exciter pcb.svg Cesco uploaded a new version of File:Meow exciter pcb.svg current
7 September 2017
- 20:1120:11, 7 September 2017 diff hist +24 MeoW →Riflettometro
- 16:3016:30, 7 September 2017 diff hist +45 MeoW No edit summary
- 16:2616:26, 7 September 2017 diff hist +14 MeoW →Modulatore
- 16:2516:25, 7 September 2017 diff hist +1 MeoW →Modulatore
- 16:2316:23, 7 September 2017 diff hist 0 File:Meow exciter pcb.svg Cesco uploaded a new version of File:Meow exciter pcb.svg
- 16:1016:10, 7 September 2017 diff hist 0 File:Meow.sch.svg Cesco uploaded a new version of File:Meow.sch.svg
6 September 2017
- 19:4219:42, 6 September 2017 diff hist +25 MeoW →Riflettometro
- 19:3719:37, 6 September 2017 diff hist +43 MeoW →Riflettometro
- 19:3319:33, 6 September 2017 diff hist +149 MeoW →Riflettometro
- 18:2618:26, 6 September 2017 diff hist −11 MeoW →BOM
- 18:2018:20, 6 September 2017 diff hist +35 Componenti No edit summary
- 18:1918:19, 6 September 2017 diff hist 0 N File:Join resistance.jpg No edit summary current
- 18:0318:03, 6 September 2017 diff hist +8 MeoW →Filtro passa-basso
- 17:5817:58, 6 September 2017 diff hist 0 MeoW →Buffer RF
- 17:5717:57, 6 September 2017 diff hist +16 MeoW →Buffer RF
- 17:5617:56, 6 September 2017 diff hist −13 MeoW →Buffer RF
- 17:5117:51, 6 September 2017 diff hist +42 MeoW →BOM
- 17:4117:41, 6 September 2017 diff hist +12 MeoW →Riflettometro
- 17:3517:35, 6 September 2017 diff hist +49 MeoW →Riflettometro
- 17:3317:33, 6 September 2017 diff hist +635 MeoW →Riflettometro
- 17:2417:24, 6 September 2017 diff hist +253 MeoW →Riflettometro
- 17:2017:20, 6 September 2017 diff hist +185 MeoW →Riflettometro
- 17:1717:17, 6 September 2017 diff hist −4 MeoW No edit summary
- 17:1417:14, 6 September 2017 diff hist −13 MeoW →BOM
- 17:1017:10, 6 September 2017 diff hist −18 MeoW →BOM
- 17:0617:06, 6 September 2017 diff hist +59 MeoW →BOM
- 17:0417:04, 6 September 2017 diff hist +190 MeoW →BOM
- 17:0217:02, 6 September 2017 diff hist 0 MeoW →BOM
- 16:5916:59, 6 September 2017 diff hist +15 MeoW →BOM
- 16:5816:58, 6 September 2017 diff hist +119 MeoW →BOM
- 16:5216:52, 6 September 2017 diff hist +398 MeoW →Modulatore
5 September 2017
- 16:3016:30, 5 September 2017 diff hist +48 N File:Antenna-bridge.png Un analizzatore di antenna a ponte di Wheatstone current
1 September 2017
- 12:5112:51, 1 September 2017 diff hist +28 Plidi No edit summary current
- 12:4512:45, 1 September 2017 diff hist +226 N Plidi Created page with "''midi backplane'' {| style="color:green; background-color:#ffffcc;" cellpadding="10" cellspacing="0" border="1" !# !Nome !Desc !Note |- |1||DGND|||| |- |2||CLOCK|||| |- |3||..."
29 August 2017
- 16:5616:56, 29 August 2017 diff hist 0 CodecBoard16 →Mappa pin
26 August 2017
- 23:5523:55, 26 August 2017 diff hist −1 CodecBoard16 →Mappa pin
- 16:3416:34, 26 August 2017 diff hist +35 MeoW →Trasformatore di uscita
23 August 2017
- 17:3217:32, 23 August 2017 diff hist 0 File:Meow.sch.svg Cesco uploaded a new version of File:Meow.sch.svg
- 17:3017:30, 23 August 2017 diff hist 0 File:Meow.sch.svg Cesco uploaded a new version of File:Meow.sch.svg
- 11:5411:54, 23 August 2017 diff hist 0 N File:Meow pa pcb.svg No edit summary
- 11:3111:31, 23 August 2017 diff hist +35 MeoW →Modulatore
- 11:2911:29, 23 August 2017 diff hist 0 N File:Meow exciter pcb.svg No edit summary
4 August 2017
- 13:1513:15, 4 August 2017 diff hist +363 MeoW No edit summary
- 13:0713:07, 4 August 2017 diff hist −17 MeoW →Trasformatore di uscita
- 13:0513:05, 4 August 2017 diff hist −1 MeoW →Trasformatore di ingresso
- 13:0413:04, 4 August 2017 diff hist +10 MeoW →Amplificatore lineare
13 July 2017
- 17:3617:36, 13 July 2017 diff hist 0 File:Darlington.png Cesco uploaded a new version of File:Darlington.png current
- 17:1917:19, 13 July 2017 diff hist +54 Amplificatori No edit summary
- 17:0517:05, 13 July 2017 diff hist 0 N File:Darlington.png No edit summary
12 July 2017
- 20:0220:02, 12 July 2017 diff hist +34 MeoW →Amplificatore lineare
- 19:2719:27, 12 July 2017 diff hist −104 Amplificatori →A partitore resistivo
- 12:4812:48, 12 July 2017 diff hist +53 Amplificatori →Amplificatori con BJT
- 12:4612:46, 12 July 2017 diff hist 0 N File:Sziklai-pair.gif No edit summary current
10 July 2017
- 17:0017:00, 10 July 2017 diff hist +100 Amplificatori →Collettore comune
- 16:5916:59, 10 July 2017 diff hist +97 Amplificatori →Collettore comune
- 16:5616:56, 10 July 2017 diff hist +40 Amplificatori →Collettore comune
- 16:5316:53, 10 July 2017 diff hist +12 N Category:Elettronica Created page with "elettroni..." current
- 16:5216:52, 10 July 2017 diff hist +8 Materiali No edit summary current
7 July 2017
- 15:5815:58, 7 July 2017 diff hist 0 MeoW →Trasformatore di uscita
- 15:5515:55, 7 July 2017 diff hist +78 MeoW →Trasformatore di uscita
- 12:0512:05, 7 July 2017 diff hist +30 Amplificatori →A partitore resistivo
- 11:3911:39, 7 July 2017 diff hist +40 Amplificatori →Amplificatori con BJT
6 July 2017
- 20:1220:12, 6 July 2017 diff hist +49 Amplificatori No edit summary
- 20:1020:10, 6 July 2017 diff hist +26 Ponti No edit summary
- 20:0920:09, 6 July 2017 diff hist +26 Amplificatori No edit summary
- 20:0820:08, 6 July 2017 diff hist +767 Amplificatori No edit summary
- 20:0720:07, 6 July 2017 diff hist −767 Componenti →Push Pull
- 20:0720:07, 6 July 2017 diff hist +1,841 N Amplificatori Created page with "== BJT == * '''β''' e' il coefficiente di amplificazione del transistor, ossia il rapporto tra la variazione di corrente di collettore e quella di base. * '''K''' e' la cost..."
- 20:0720:07, 6 July 2017 diff hist −1,843 Componenti No edit summary
- 20:0520:05, 6 July 2017 diff hist 0 N File:CQ SWR tandem match W1FB.pdf No edit summary current
- 19:4219:42, 6 July 2017 diff hist +37 Ponti →Bruene
- 19:4219:42, 6 July 2017 diff hist 0 N File:Douma bridge.gif No edit summary current
- 19:3719:37, 6 July 2017 diff hist +25 Ponti →Tandem match
- 19:3219:32, 6 July 2017 diff hist +388 N Ponti Created page with "== Tandem match == thumb In una linea di trasmissione, la corrente delle onde riflesse e' sfasata di 180° rispetto a quella delle onde dir..."
- 19:2419:24, 6 July 2017 diff hist 0 N File:Tandem match coupler.gif No edit summary current
5 July 2017
- 18:4518:45, 5 July 2017 diff hist −122 Componenti →BJT
- 18:3818:38, 5 July 2017 diff hist −25 Componenti →Emettitore comune
- 18:2218:22, 5 July 2017 diff hist +110 Componenti →Emettitore comune
- 18:2118:21, 5 July 2017 diff hist +32 Componenti →Emettitore comune
- 18:1718:17, 5 July 2017 diff hist +71 Componenti →Emettitore comune
- 18:1218:12, 5 July 2017 diff hist +69 Componenti →Emettitore comune
- 18:1018:10, 5 July 2017 diff hist −16 Componenti →Emettitore comune
- 18:0918:09, 5 July 2017 diff hist +63 Componenti →Emettitore comune
- 17:4217:42, 5 July 2017 diff hist −63 Componenti →Emettitore comune
- 17:4017:40, 5 July 2017 diff hist +135 Componenti →Emettitore comune
- 17:3217:32, 5 July 2017 diff hist +71 Componenti →BJT
4 July 2017
- 12:3512:35, 4 July 2017 diff hist +17 Componenti →Emettitore comune
- 12:1312:13, 4 July 2017 diff hist +2 Componenti →Emettitore comune
- 12:0112:01, 4 July 2017 diff hist −14 Componenti →BJT
3 July 2017
- 20:0520:05, 3 July 2017 diff hist +18 Componenti →Collettore comune
- 19:5419:54, 3 July 2017 diff hist +120 Componenti →Collettore comune
- 19:5319:53, 3 July 2017 diff hist +12 Componenti →Emettitore comune
- 19:5219:52, 3 July 2017 diff hist −26 Componenti →Collettore comune
- 19:4919:49, 3 July 2017 diff hist −36 Componenti →Collettore comune
- 19:4419:44, 3 July 2017 diff hist +12 Componenti →Collettore comune
- 19:3919:39, 3 July 2017 diff hist +60 Componenti →Collettore comune
- 19:2219:22, 3 July 2017 diff hist +22 Componenti →Emettitore comune
- 19:2019:20, 3 July 2017 diff hist +55 Componenti →Emettitore comune
- 19:1919:19, 3 July 2017 diff hist +11 Componenti →Emettitore comune
- 18:4918:49, 3 July 2017 diff hist +35 Componenti →Collettore comune
- 18:4918:49, 3 July 2017 diff hist 0 N File:CommonCollector.jpg No edit summary current
- 15:5615:56, 3 July 2017 diff hist 0 MeoW →Amplificatore lineare
- 15:5415:54, 3 July 2017 diff hist +29 MeoW →Amplificatore lineare
- 15:5115:51, 3 July 2017 diff hist −956 MeoW →Buffer RF
- 15:4915:49, 3 July 2017 diff hist +946 Componenti →Emettitore comune
29 June 2017
- 20:0020:00, 29 June 2017 diff hist +66 Componenti →Emettitore comune
- 19:5719:57, 29 June 2017 diff hist +7 MeoW →Buffer RF
- 19:5619:56, 29 June 2017 diff hist +8 MeoW →Buffer RF
- 19:4919:49, 29 June 2017 diff hist +11 MeoW →Buffer RF
- 19:4619:46, 29 June 2017 diff hist +180 MeoW →Buffer RF
27 June 2017
- 18:2018:20, 27 June 2017 diff hist +9 Componenti No edit summary
- 17:3017:30, 27 June 2017 diff hist −7 Componenti →BJT
- 17:2717:27, 27 June 2017 diff hist +109 Componenti →BJT
- 17:2017:20, 27 June 2017 diff hist +119 Componenti No edit summary
- 17:1017:10, 27 June 2017 diff hist 0 N File:Emitter-stabilised-bias.gif No edit summary current
21 June 2017
- 19:4219:42, 21 June 2017 diff hist +69 MeoW →Buffer RF
- 19:3719:37, 21 June 2017 diff hist +68 MeoW →Buffer RF
- 19:2819:28, 21 June 2017 diff hist +88 MeoW →Buffer RF
20 June 2017
- 15:5615:56, 20 June 2017 diff hist 0 N File:TP5410.pdf No edit summary current
19 June 2017
- 21:4021:40, 19 June 2017 diff hist −2 MeoW →Trasformatore di uscita
- 21:3721:37, 19 June 2017 diff hist +1 MeoW →Trasformatore di uscita
- 21:3421:34, 19 June 2017 diff hist −89 MeoW →Trasformatore di uscita
- 21:3321:33, 19 June 2017 diff hist +173 MeoW →Filtro passa-basso
- 21:2321:23, 19 June 2017 diff hist −1 MeoW →Trasformatore di uscita
- 21:2221:22, 19 June 2017 diff hist +77 MeoW →Trasformatore di uscita
- 21:2021:20, 19 June 2017 diff hist +32 MeoW →Trasformatore di uscita
- 21:1621:16, 19 June 2017 diff hist +263 MeoW →Amplificatore lineare
- 21:1221:12, 19 June 2017 diff hist −1,083 MeoW →Amplificatore lineare
- 21:1221:12, 19 June 2017 diff hist +1,381 N Componenti Created page with "=== DDS === Un DDS e' un dispositivo composto da un '''oscillatore''', un '''accumulatore di fase''' e da un '''DAC'''. Attraverso un bus di controllo e' possibile impostare..."
- 21:1121:11, 19 June 2017 diff hist −273 MeoW →DDS
- 20:5620:56, 19 June 2017 diff hist +37 MeoW →Amplificatore lineare
- 20:0920:09, 19 June 2017 diff hist 0 MeoW →Amplificatore lineare
13 June 2017
- 23:2923:29, 13 June 2017 diff hist +32 MeoW →Trasformatore di uscita
- 23:2723:27, 13 June 2017 diff hist +57 MeoW →Trasformatore di uscita
- 23:1623:16, 13 June 2017 diff hist +31 MeoW →Trasformatore di uscita
- 23:1423:14, 13 June 2017 diff hist −28 MeoW →Trasformatore di ingresso
- 23:1323:13, 13 June 2017 diff hist +2 MeoW →Amplificatore lineare
- 23:1323:13, 13 June 2017 diff hist 0 N File:Trasformatore.jpg No edit summary current
- 22:2222:22, 13 June 2017 diff hist +128 MeoW →Amplificatore lineare
- 21:1321:13, 13 June 2017 diff hist +154 MeoW →Trasformatore di ingresso
- 21:1021:10, 13 June 2017 diff hist −10 MeoW →Amplificatore lineare
- 21:1021:10, 13 June 2017 diff hist +109 MeoW →Amplificatore lineare
8 June 2017
- 20:0720:07, 8 June 2017 diff hist +31 MeoW →Trasformatore di uscita
- 20:0320:03, 8 June 2017 diff hist 0 MeoW →Amplificatore lineare
- 19:5919:59, 8 June 2017 diff hist +236 MeoW →Amplificatore lineare
- 19:4819:48, 8 June 2017 diff hist 0 N File:Electronic Amplifier Push-pull.png No edit summary current
- 19:4719:47, 8 June 2017 diff hist +1 MeoW →Amplificatore lineare
- 19:4619:46, 8 June 2017 diff hist +6 MeoW →Amplificatore lineare
- 19:4519:45, 8 June 2017 diff hist −6 MeoW →Amplificatore lineare
- 19:4419:44, 8 June 2017 diff hist +5 MeoW →Amplificatore lineare
- 19:4419:44, 8 June 2017 diff hist +2 MeoW →Amplificatore lineare
- 19:4319:43, 8 June 2017 diff hist −2 MeoW →Amplificatore lineare
- 19:4219:42, 8 June 2017 diff hist +1 MeoW →Amplificatore lineare
- 19:4119:41, 8 June 2017 diff hist +5 MeoW →Amplificatore lineare
- 19:4119:41, 8 June 2017 diff hist +54 MeoW →Amplificatore lineare
- 19:4019:40, 8 June 2017 diff hist 0 N File:N-mosfet.gif No edit summary current
- 19:3419:34, 8 June 2017 diff hist −6 MeoW →Amplificatore lineare
