Transistor power and root computing system

Details Transistor power and root computing system Transistor power and root computing system

1975-05-19

1976-06-29

Ruggiero, Joseph F.

Registers

Transfer mechanism

Traveling pawl

2351935, 235194, 307229, 328145, G06G 716, G06G 720

Patent

active

039671054

ABSTRACT:
A transistorized non-linear device is provided for converting input voltage signals to logarithmic current output signals and input current signals to exponential output voltage signals. This is performed using operational amplifiers having as the reference current for the computational element the collector current of a transistor which is operated with a near zero collector-base voltage. Square, square root, product and geometric mean functions are shown in circuits according to the invention.

REFERENCES:
patent: 3328569 (1967-06-01), Brewster
patent: 3329836 (1967-07-01), Pearlman et al.
patent: 3393306 (1968-07-01), Kundu
patent: 3492471 (1970-01-01), Crowell
patent: 3790819 (1974-02-01), Chamran

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