Integrate and hold amplifier
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Oct 2, 1990
Grant Date -
N/A
app pub date -
Jan 31, 1989
filing date -
Jan 31, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a system which uses information in a certain band of frequencies, f.sub.b. The information of interest is contained in an analog signal that has noise at higher frequencies. The analog signal is sampled using an integrate and hold amplifier, hence, noise from higher frequencies is aliased into the region of interest f.sub.b. In accordance with the present invention, the integrated and hold amplifier has a frequency response which has a zero at a frequency, f.sub.n, which is one of the frequencies aliased into the band of frequencies f.sub.b. Thus, the effect of the noise that appears near the frequency f.sub.n has much less effect on the signal when it is aliased into the frequency band of interest, f.sub.b. The performance of the system is thereby improved.
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