Logarithmic amplifier with temperature compensation means

Details Logarithmic amplifier with temperature compensation means Logarithmic amplifier with temperature compensation means

1975-11-21

1976-11-16

Zazworsky, John

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

307230, 307311, 328145, G06G 900

Patent

active

039926222

ABSTRACT:
In a logarithmic amplifier employing a log-diode connected across an operational amplifier, a dividing resistor and a transistor circuit are connected in parallel between the output of the operational amplifier and the log-diode. The temperature characteristic of the log-diode and that of the transistor circuit cancel each other to effect temperature compensation in the output of the operational amplifier.

REFERENCES:
patent: 3448289 (1969-06-01), Harris
patent: 3624409 (1971-11-01), Folsom et al.

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