Amplifier comprising a first and a second amplifier element

Details Amplifier comprising a first and a second amplifier element Amplifier comprising a first and a second amplifier element

H - Electricity

03

F

330/102, 330/21

H03F 3/45 (2006.01) H03F 1/32 (2006.01) H03F 3/30 (2006.01) H03F 3/68 (2006.01)

Patent

CA 1138056

1.11.1978 1 PHN 8978 ABSTRACT Amplifier comprising a first and a second amplifier element. An amplifier comprising a first and a second amplifier element, whose outputs are connected to a load, and a difference circuit which includes an attenuator, in which the output signal of the first amplifier element is compared with the input signal, after which a resulting correction signal is applied to the second amplifier element, the two amplifier elements, as the case may be preceded by pre- amplifiers, taking the form of power amplifiers, and the second amplifier element also being provided with a substantially identical difference circuit which com- prises an attenuator, which circuit supplies a correction signal to the first amplifier element, a signal to be amplified being applied to both amplifier elements. As the distortion signals appear at the load as "common mode" signals, the overall distortion becomes substantially zero in the case of equal attenuation in the two auxiliary circuits. The power amplifiers may be provided with a voltage output as well as a current output.

317185

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