Logarithmic detectors

Details Logarithmic detectors Logarithmic detectors

2011-03-22

2011-03-22

Mis, David (Department: 2817)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C329S346000, C329S348000, C329S349000, C331S075000, C331S1170FE, C331S173000

Reexamination Certificate

active

07911235

ABSTRACT:
Disclosed is a logarithmic detector comprising: an amplifier element; means for setting a frequency of operation of the detector; and a controller, wherein an input signal to the amplifier element is arranged to cause an oscillation in the amplifier element, and the controller is operable to sense a pre-determined threshold, indicative of oscillation and, in response to sensing said threshold, to interrupt the oscillation of the amplifier such that the frequency of said interruption is proportional to the logarithm of the power of the input signal.

REFERENCES:
patent: 3092779 (1963-06-01), De Niet
patent: 3320530 (1967-05-01), Pearlman
patent: 3791272 (1974-02-01), Nobusawa

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