Reconfigurable filter system

Details Reconfigurable filter system Reconfigurable filter system

1996-10-25

1998-02-17

Dombroske, George M.

Measuring and testing

Engine detonation

Specific type of detonation sensor

73 3509, 36443108, G01L 2322

Patent

active

057193266

ABSTRACT:
Two filter sections having different frequency responses are interconnected via selectively enabled switches, formed on the same integrated circuit (IC) as the filter sections, between a signal input terminal and a signal output terminal. The selectively enabled switches can be used to: (a) selectively connect the two filter sections in cascade between the signal input and output terminals to produce a bandpass filter; or (b) selectively connect the two filter sections in parallel to produce a notch filter, or (c) couple only one of the two filter sections between the signal input and output terminals; or (d) provide a short circuit between the signal input and output terminals. In a preferred embodiment the filter sections are switched capacitor filters. The filter system of the invention is highly suited for use in an engine knock signal processor integrated circuit.

REFERENCES:
patent: 4345558 (1982-08-01), Yamaguchi et al.
patent: 4424706 (1984-01-01), Oh
patent: 5121729 (1992-06-01), Hashimoto et al.
patent: 5400644 (1995-03-01), Remboski, Jr. et al.

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