Little Ghostman
- Joined Jan 1, 2014
- 305
You didnt read what was written, a PAIR in ANTI PARALLEL on the INPUTS, why would that clip the signal? or am I missing something?????
I'm talking about the single end diode on the output or input of opamps or transistors, to protect the op amp and transistor from a Large negative voltage or negative cycle from damaging itBut when u have these clamping diodes only on the negative cycle voltage, it clips or shunts the negative cycle off which means the signal is a pulsing half wave form going to the input of a transistor or op amp. Yes the diode protects it from a large negative voltage but it changes the waveform into a pulsing waveform
But if CR19 was not there, the transistor would still switch on ONLY during the positive pulses, so it does not matter if the negative cycles are clipped before the transistor; the transistor would appear to clip them anyway.But when u have these clamping diodes only on the negative cycle voltage, it clips or shunts the negative cycle off which means the signal is a pulsing half wave form going to the input of a transistor or oop amp. Yes the diode protects it from a large negative voltage bbut it changes the waveform into a pulsing waveform
More than 5V below the emitter. If the emitter is at -10V, then the base must not go below -15V. If the emitter is at +100V, then the base must not go below +95V. etc.But if the negative cycle is more than -5 volts , the NPN transistor will get damaged?
Probably a few volts below the negative rail.which is what MAX negative voltage can you apply to a 741 op amp? or a LM101 amplifier IC chip?
by Aaron Carman
by Aaron Carman
by Duane Benson