Choose the wrong statement:Voltage divider bias circuit is most stable biasing circuitBJT is worked as an amplifier only in active regionVoltage gain of BJT amplifier is almost constant at mid-band frequencyNegative feedback is required to design an oscillator circuit
Question
Choose the wrong statement:Voltage divider bias circuit is most stable biasing circuitBJT is worked as an amplifier only in active regionVoltage gain of BJT amplifier is almost constant at mid-band frequencyNegative feedback is required to design an oscillator circuit
Solution
The wrong statement is: "Negative feedback is required to design an oscillator circuit".
In fact, positive feedback is required to design an oscillator circuit. Oscillators work on the principle of positive feedback where the output is fed back into the input to generate sustained oscillations. Negative feedback is used in amplifier circuits to stabilize the gain and reduce distortions.
Similar Questions
An npn bipolar junction transistor (BJT) is operating in the active region. If the reverse bias across the base-collector junction is increased, thenThe effective base-width increases and common-emitter current gain increases The effective base-width increases and common-emitter current gain decreasesThe effective base-width decreases and common-emitter current gain increasesThe effective base-width decreases and common-emitter current gain decreases
An npn bipolar junction transistor (BJT) is operating in the active region. If the reverse bias across the base-collector junction is increased, thenThe effective base-width increases and common-emitter current gain decreasesThe effective base-width increases and common-emitter current gain increases The effective base-width decreases and common-emitter current gain decreasesThe effective base-width decreases and common-emitter current gain increases
A second condition for oscillation is 1 pointno gain around the feedback loopa gain of 1 around the feedback loopthe attenuation of the feedback circuit must be one-thirdthe feedback circuit must be capacitive
The Wien-bridge oscillator’s positive feedback circuit is 1 pointan RL circuita voltage dividera lead-lag circuitan LC circuit
The Wien-bridge oscillator’s positive feedback circuit is
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