Switched capacitor filter
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 29, 1989
Grant Date -
N/A
app pub date -
Aug 13, 1987
filing date -
Aug 13, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A biquadrature switched capacitor filter having differential input/output integrator amplifiers (12,34) and switched capacitor networks (16,28,36,40). The differential outputs of one amplifier (12) are crossed and connected to the switched capacitor networks (36,40) of the other amplifier (34) to provide a negative capacitance effect. Feedforward capacitors (70,72) are switched to prevent the stage input signals (IN+, IN-) from being coupled during certain phases of a biphase nonoverlapping clock. In high-pass applications, a feedback capacitor (134, 136) makes positioning of pole and zero responses easy. Amplifier bandwidth is controlled by switched capacitors (148, 152) connected to the amplifiers during certain clock phases.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully