Digitally controlled amplifying equipment

Details Digitally controlled amplifying equipment Digitally controlled amplifying equipment

1976-09-13

1978-03-14

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including gain control means

84 124, 84DIG10, 330 86, 330282, H03G 330

Patent

active

040793346

ABSTRACT:
A digitally controllable amplifier unit and musical instrument amplifier incorporating such a unit. Digital control of the transfer function of a high-gain virtual-earth amplifier is effected by switching input and feedback impedances by means of transistor switches. Digital storage means are used to control the transistor switches.

REFERENCES:
patent: 3470487 (1969-09-01), Lucas et al.
patent: 3659031 (1972-04-01), Adachi
patent: 3897709 (1975-08-01), Hiyoshi et al.
patent: 3974436 (1976-08-01), Timpe

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