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2018/10/10 · Sometimes this calls for a DC blocking capacitor with values in the 10 to 100μF range. Capacitors can build up a charge if the resistance required to bleed off the DC voltage is too large. This can happen if the input resistance of
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2007/1/2 · adoption of mixed AC and DC coupling is the cause of your output offset problem. -6mV at input times the gain of 11 (10/1+1=11) gives -66mVdc at the output. The circuit is badly designed as shown and still wrong with your alternative NFB resistors. The -ve input has 910r to ground. The +ve input has 22k to ground.
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2018/2/13 · 2,332. Feb 11, 2018. #7. The gain of the circuit for the DC offset is one ("unity"). C1 blocks DC, so at DC the feedback around the amplifier is just R4, setting the non-inverting gain to one. This is a very common circuit for amplifying a small AC signal using a "single ended" (unipolar) power supply.
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2011/4/17 · I picked up an old Xtant 2200i and performed some testing and listening. Left channel has -0.1 DC, right channel +0.2 DC. Did not notice cone offset with cheap test speakers. I've found a post stating that 10mV is the highest acceptable level. Can I get a confirmation?
2004/12/29 · In a typical Lin topology amp or a symetical (2 LTPs, 2VAS's) variation, what are the factors or topology features that contribute to DC offset. I'm not talking about a serious offset, just within the normal acceptable range of 40mV or less. For example I have completed two working amps that
2019/8/30 · If you have access to a signal generator (or another SDR that's pretty well calibrated for TX), you can follow a procedure very similar to that for calibrating the TX module via osmocom_siggen and a spectrum analyzer. Run osmocom_fft --dc-offset-mode=0 --iq-balance-mode=0. Tune the bladeRF to some frequency f1.
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