class B amplifier

class B amplifier

[‚klas ′bē ′am·plə‚fī·ər]
(electronics)
An amplifier in which the grid bias is approximately equal to the cutoff value, so that anode current is approximately zero when no exciting grid voltage is applied, and flows for approximately half of each cycle when an alternating grid voltage is applied.
A transistor amplifier in which each transistor is in its active region for approximately half the signal cycle.
References in periodicals archive ?
The RF performances of the Doherty amplifier-I (a combination of a class B carrier amplifier and a bias-tuned class C peaking amplifier) have been compared with those of a class B amplifier alone.
Performance comparisons between the Doherty-I and class B amplifier, and between the Doherty-II and class AB amplifiers are performed.
IMD5 is worse at a low power level but it becomes better at a high power level (above 33 dBm), in comparison with the class B amplifier.
The output spectra of the Doherty-I and class B amplifier at a 30 dBm output power, and Doherty-II and class AB amplifier at an output power of 32 dBm are shown in Figure 12.