Logarithmic amplifier

Details Logarithmic amplifier Logarithmic amplifier

1988-03-23

1988-11-22

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

307492, 307310, 328145, H04N 514

Patent

active

047869704

ABSTRACT:
A D.C. stabilized logarithmic amplifier which uses bipolar transistors which produces an output voltage V.sub.out(comp) temperature compensated for the saturation leakage current I.sub.s and the thermal voltage V.sub.t.

REFERENCES:
patent: 3571618 (1971-03-01), Inacker et al.
patent: 3573491 (1971-04-01), Goss et al.
patent: 3745474 (1973-07-01), Hughes
patent: 3845326 (1974-10-01), Godden
patent: 3965371 (1976-06-01), Sato et al.
patent: 4100433 (1978-07-01), Duffy et al.
patent: 4324990 (1982-04-01), Gay
patent: 4333023 (1982-06-01), Hood, Jr.
patent: 4442549 (1984-04-01), Main
patent: 4463274 (1984-07-01), Swartz
patent: 4604532 (1986-08-01), Gilbert
patent: 4613776 (1986-09-01), Ishii
Drazhev et al., "High-Speed Logarithmic Video Amplifiers", 1980, pp. 106-108.

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