High frequency continuous time filter

Details High frequency continuous time filter High frequency continuous time filter

1990-03-28

1991-11-05

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328167, 333166, H03K 500, H04B 100

Patent

active

050633090

ABSTRACT:
A high-frequency integrated circuit continuous time low pass filter. An on-chip oscillator is built into the filter. The filter frequency accuracy is established by trimming the frequency of the on-chip oscillator during wafer probe. The oscillator is off during normal operation of the filter. Therefore, the filter does not produce noise that will degrade the performance of the filter during normal operation. After trimming, the filter design is such that accuracy is maintained even during temperature and power supply changes. The adjustment can be made without the oscillator by direct measurement of the filter response.

REFERENCES:
patent: 4521702 (1985-06-01), Kleinberg
patent: 4691171 (1987-09-01), Van Roermund et al.
patent: 4888502 (1989-12-01), Jarrett
patent: 4945311 (1990-07-01), Smith

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