Circuit in which output circuit and operational amplifier equipp

Details Circuit in which output circuit and operational amplifier equipp Circuit in which output circuit and operational amplifier equipp

1986-06-13

1987-07-07

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307311, 328142, 250551, 330 59, G06G 712, H03K 342

Patent

active

046789464

ABSTRACT:
A function generator which has a plurality of operational amplifiers and a reference voltage generator circuit for applying a different reference voltage to the input terminal of each of the plurality of operational amplifiers. Also included is an LED connected between the output terminal and input terminal of each of the operational amplifiers; photo transistors which receive the emitted light of the LEDs for conversion into a current; and a load resistor which converts the current to a voltage.

REFERENCES:
patent: 3112449 (1963-11-01), Miller
patent: 3196291 (1965-07-01), Woodward, Jr.
patent: 3410961 (1968-11-01), Slana
patent: 3588671 (1971-06-01), Deboo et al.
patent: 3736515 (1973-05-01), Kadron et al.
patent: 3893037 (1975-07-01), Herbert
patent: 4066973 (1978-01-01), McNally
patent: 4268789 (1981-05-01), Nagano
patent: 4424458 (1984-01-01), Buck et al.
Wittlinger, "Absolute Value Circuit", published in RCA Technical Notes, TN No. 960, on Jun. 17, 1974, in the United States.

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