Digitally controlled variable conductance

Details Digitally controlled variable conductance Digitally controlled variable conductance

1975-11-28

1977-02-22

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307229, 307251, 307304, 328167, 330 85, 330107, H03K 906, H03K 1760

Patent

active

040094006

ABSTRACT:
A digitally tuned active filter is disclosed. The filter is tunable by digitally controlling the variable conductance which comprises two resistors, one of which is in series with a field-effect transistor switch and those two in parallel with the other resistor. The field-effect transistor switch is switched by a digitally controlled variable duty cycle generator.

REFERENCES:
patent: 3588531 (1971-06-01), Bjor
patent: 3767939 (1973-10-01), Chamran
patent: 3860877 (1975-01-01), Games et al.

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