Wide-bandwidth low-distortion amplifier

Details Wide-bandwidth low-distortion amplifier Wide-bandwidth low-distortion amplifier

1980-09-22

1983-12-13

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including current mirror amplifier

330293, 330299, 330311, H03F 318

Patent

active

044207255

ABSTRACT:
A low-noise wide-band bipolar transistor amplifier in which distortion caused by non-linear transistor operating characteristics is substantially eliminated. An input signal is coupled to the base of a first transistor connected in an emitter follower configuration with the signal formed at the emitter of the first transistor coupled to the base of a second transistor. Currents are supplied to the first and second transistors by a current mirror circuit in such a manner that a ratio of the current supplied to the first transistor to the current supplied to the second transistor is made constant. An output signal is produced in response to current variations in a transistor of the current mirror circuit which supplies current to the second transistor.

REFERENCES:
patent: 4103248 (1978-07-01), Idei
patent: 4228404 (1980-10-01), Widlar
McClellan, "Current Source and 555 Timer Make Linear V-to-F Converter", Electronics, Jun. 10, 1976, pp. 108, 109.

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