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Input selector using PS gating of opamps?
Input selector using PS gating of opamps?
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Old 23rd February 2004, 04:12 PM   #11
azira is offline azira  United States
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Side note: the 74LS245 is the wrong part, I was thinking about a 74ABT125. Either that or an open-drain buffer like a 74LS05.
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Old 24th February 2004, 01:06 PM   #12
Jan Dupont is offline Jan Dupont  Denmark
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The old QUAD preamps used a single NPN transistor for each channel to ground the output signal and thereby mute the signal
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