H - Electricity – 03 – B
Patent
H - Electricity
03
B
324/45, 331/69
H03B 5/04 (2006.01) H03L 5/00 (2006.01)
Patent
CA 1224853
ABSTRACT OF THE DISCLOSURE An AC signal source having constant frequency-amplitude product is also easily realizable in hybrid microcircuit form. A square wave oscillator output is rectified and clamped to a feedback control voltage. The resulting controlled amplitude square wave is low-pass filtered to produce a sinusoidal output signal which is typically amplified and applied to a variable-impedance load. The sinusoidal signal is also applied to a similar but simulated load of fixed impedance value and the current flowing through the simulated load is summed with a temperature- compensated reference current producing an error current which is then integrated to produce the feedback control voltaqe which controls the amplitude of the sinusoidal signal so as to maintain a constant frequency amplitude product.
455953
Harter Richard M.
Ramsdale Kurt A.
Lesperance Pierre
Simmonds Precision Products Inc.
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