Class B operation is provided when the dc bias leaves the transistor biased just off, the transistor turning on when the ac signal is applied.

Related MCQs

• A 35 mV signal is applied to the base of a properly biased transistor with an r'e = 8 Ω and RC = 1 kΩ. The output signal voltage at the collector is:
• The amount of power dissipated by the transistor is the of that drawn from the dc supply (set by the bias point) and the amount delivered to the ac load.
• Which type of power amplifier is biased for operation at less than 180º of the cycle?
• A class amplifier is biased slightly above cutoff and operates in the linear region for slightly more than 180º of the input cycle.
• The class amplifier is biased below cutoff.
• In class B operation, at what fraction of VCC should the level of VL(p) be to achieve the maximum power dissipated by the output transistor?
• A silicon power transistor is operated with a heat sink (θSA = 1.5ºC/W). The transistor, rated at 150 W (25ºC), has θJC = 0.5º C/W, and the mounting insulation has θCS = 0.6 ºC/W. What is the maximum power that can be dissipated if the ambient temperature is 50ºC and TJmax = 200 ºC?
• In class B operation, the current drawn from a single power supply has the form of rectified signal.
• The lower transistor of a totem-pole output is OFF when the gate output is
• The upper transistor of a totem-pole output is OFF when the gate output is