Precision oscillator circuits and methods with switched capacitor frequency control and frequency-setting resistor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 29, 2002
Grant Date -
N/A
app pub date -
Oct 6, 2000
filing date -
Oct 6, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A precision oscillator circuit providing a periodic waveform is provided. A periodic waveform is provided by the use of an integrating op-amp circuit in conjunction with a switched capacitor frequency control loop and a user input adapted to be coupled with a frequency-setting resistor. The frequency of the periodic waveform is determined by the values of the switched capacitor and the resistor. The oscillator circuit has an arrangement which minimizes the effect of the op-amp circuit's offset voltage. The user input is kept robust against user-introduced capacitance by the use of controllable current sources to bias the op-amp circuit. A linearity correction circuit is also provided to correct for non-ideal op-amp circuits.
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