Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1984-02-27
1987-04-21
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
328162, 307520, 84 113, H03B 100, H03B 110, H03K 500
Patent
active
046599967
ABSTRACT:
A switched capacitor filter system is provided which is programmed to filter a predetermined sequence of tone signals. The filter system is de-rung after each selected tone signal is detected by increasing the clock frequency of the switched capacitor from the programmed value corresponding to a tone signal up to a center frequency substantially greater than that of the tone signals. Energy stored in the filter system is thus quickly dissipated. Rapid sequences of sequential tone signals are thus filtered without the problems associated with ringing of the filter.
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Caves et al., "Sampled Analog Filtering Using Switched Cap. as Resistor Equivalents", IEEE Jor. of SSC, vol.-SC12, No. 6, 12/77.
Allstot et al., "Electrically-Programmable Switched Cap Filter", IEEE Jor. of SSC, vol. SC-14, No. 6, 12/79, pp. 1034-1044.
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Callahan Timothy P.
Downey Joseph T.
Kahler Mark P.
Miller Stanley D.
Motorola Inc.
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