Intermediate frequency (IF) sampling clock-to-clock auto-ranging

Details Intermediate frequency (IF) sampling clock-to-clock auto-ranging Intermediate frequency (IF) sampling clock-to-clock auto-ranging

1996-12-23

1999-01-19

Gaffin, Jeffrey A.

Coded data generation or conversion

Analog to or from digital conversion

Nonlinear

341132, 341118, 341142, H03M 162

Patent

active

058618317

ABSTRACT:
A clock-to-clock auto-ranging ADC operates directly on an analog signal in the IF band or higher to track its gain range on a clock-to-clock basis and produce a digital signal that maintains high resolution of the analog signal without clipping or loss of signal sensitivity. This is accomplished by sampling an analog signal of sufficiently high frequency that a peak detector can accurately determine the maximum signal level over at least one-half a signal period and then reset the signal gain going into the ADC prior to the beginning of the next sampling period. This insures that the analog signal will always be within the range of the ADC. In accordance with the well known principles of sampling theory, the sampled analog signal is aliased into the frequency region between DC and one half the sampling frequency.

REFERENCES:
patent: 4851842 (1989-07-01), Iwamatsu
patent: 4999628 (1991-03-01), Kakubo et al.
patent: 5006851 (1991-04-01), Kaneaki et al.
patent: 5068658 (1991-11-01), Ohlsson et al.
patent: 5111202 (1992-05-01), Rivera et al.
patent: 5194865 (1993-03-01), Mason et al.
patent: 5365233 (1994-11-01), Schaub
patent: 5389927 (1995-02-01), Turney et al.
patent: 5546081 (1996-08-01), Baumgarti
patent: 5630221 (1997-05-01), Birleson

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