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Subject: Re: Need 2SC3326 Transistor for an Audio Mute circuit
X-Newsreader: Microsoft Outlook Express 5.50.4522.1200
Date: Sat, 21 Dec 2002 05:47:24 GMT
NNTP-Posting-Date: Sat, 21 Dec 2002 06:47:24 MET
Organization: Telenet Internet
wrote in message news:XxycnUUZu6EoUJ6jXTWcqQ@giganews.com...
> I am building an audio mute circuit which effectively short circuits the
> ground. It works pretty well except that there is distortion in the audio
> the mute circuit is not active. I built it with a garden variety 3904 as
> and I suspect that when this part is turned off there is enough junction
> capacitance in the collector to cause distortion at audio frequencies. I
> seen mute circuits with the 2SC3326 as the switch but I can not find that
> available anywhere. What other parts are there that would do the job? I
> have +3.3V DC available so I might have trouble turning a FET on and off.
No you won't. A BSS138 has an Rds(on) < 2 ohm @ Vgs = 2.5V
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