Voltage controlled element

Details Voltage controlled element Voltage controlled element

1981-05-27

1984-09-11

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330261, 330285, H03F 345, H03G 310

Patent

active

044713207

ABSTRACT:
A voltage controlled element includes first and second pairs of transistors where bases of two of the transistors are connected to a reference voltage and bases of the remaining two transistors are connected to a control signal, emitters of transistors of respective pairs are connected together, differences in collector currents between transistors of said pairs define output signals from said element, including feedback means for providing as a portion of a signal input to means for drawing currents from said connected emitters signal outputs of said element.

REFERENCES:
patent: 3908172 (1975-09-01), Aschermann et al.
patent: 4092612 (1978-05-01), Schade
patent: 4157512 (1979-06-01), Schmoock
patent: 4205275 (1980-05-01), Blackburn
patent: 4216436 (1980-08-01), Lefferts
patent: 4227095 (1980-10-01), Bazil
David Baskind & Harry Rubens, "Techniques for the Realization and Application of Voltage Controlled Amplifiers and Attenuators", presented at 60th Convention, May 2-5, 1978, Los Angeles Audio Engineering Soc.
Douglas R. Curtis, "A Monolithic Voltage Controlled Amplifier Employing Log-Antilog Techniques", Journal of the Audio Engineering Society, Mar. 1976, vol. 24, No. 2.

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