Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1991-06-03
1993-04-06
Sikes, William L.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307491, 307310, 328142, 328145, G06G 724, H01L 3100
Patent
active
052006557
ABSTRACT:
A linear-to-exponential converter circuit for generating a temperature-independent signal which is exponentially related to an input signal. An amplifier stage forming an exponential multiplier is comprised of a bipolar junction transistor which, characteristic of bipolar junction transistors, generates a current at a collector electrode which is dependent upon temperature. A signal to be amplified by the expontential multiplier formed of the bipolar junction transistor is first provided to a temperature compensation circuit. The temperature compensation circuit introduces a temperature dependency upon the input signal which is the inverse to that of the temperature dependency of the bipolar junction transistor of the amplification circuit. The temperature dependency of the amplified signal is removed, and a temperature-invariant signal is produced thereby.
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Cunningham Terry D.
Kelly Robert H.
Motorola Inc.
Sikes William L.
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