When a BJT is operating in the active region, the voltage drop from the base to the emitter VBE is approximately equal to the____
A: base bias voltage
B: base current times the base resistor
C: diode drop (about 0.7 V)
D: emitter voltage
A: base bias voltage
B: base current times the base resistor
C: diode drop (about 0.7 V)
D: emitter voltage
举一反三
- When a BJT is biased in the cutoff region the collector-to-emitter voltage is typically equal to （ ）. A: the emitter voltage B: the collector supply voltage C: 0.03 V D: the collector current times the collector resistor
- When a BJT is in cutoff, the collector-to-emitter voltage is typically equal to _____ A: collector supply voltage B: collector current times collector resistor C: 0.3 Volts D: emitter voltage
- β is the ratio of _____. A: collector current to emitter current B: base current to collector current C: collector current to base current D: emitter current to collector current
- The base frame is the____ of the robot.
- The effective value of ac voltage or current is（ ） A: The average value of a voltage or current B: DC equal to the AC thermal effect is defined as the effective value of AC C: voltage or current are 0.707 of their amplitudes D: closely related to the frequency of alternating current