Compensation circuit for piezoelectric pickup

Details Compensation circuit for piezoelectric pickup Compensation circuit for piezoelectric pickup

1997-04-16

1999-03-02

Witkowski, Stanley J.

Music

Instruments

Electrical musical tone generation

84731, 84736, 84DIG9, 84DIG24, G10H 112, G10H 314, G10H 318

Patent

active

058774475

ABSTRACT:
The signal from a piezo-electric transducer in an electro-acoustic guitar is modified by a variable depth notch filter. The notch filter includes two paths between an input and a summation circuit. The signals in the two paths are 180.degree. out of phase and one of the paths includes a bandpass filter. The notch is located at approximately 5 khz. The depth of the notch depends upon either the broadband amplitude or the narrowband amplitude of the signal from the transducer and the depth of the notch is controlled using either feedback or feedforward control.

REFERENCES:
patent: 3453920 (1969-07-01), Scherer
patent: 3493669 (1970-02-01), Elbrecht et al.
patent: 4399326 (1983-08-01), Bode
patent: 4480520 (1984-11-01), Gold
patent: 5206449 (1993-04-01), McClish
patent: 5268527 (1993-12-01), Waller
Advertisement by AKG Acoustcs, Inc.; Model 902 De-esser.COPYRGT. 1992.
Advertisement by AKG Acoustcs, Inc.; Model 263X De-esser .COPYRGT. 1992.

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