Bandgap reference circuit with offset voltage removal
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United States of America Patent
Stats
-
Jun 23, 2015
Grant Date -
Aug 14, 2014
app pub date -
Feb 11, 2013
filing date -
Feb 11, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An example bandgap reference circuit includes an amplifier, a first, a second, and a third switch, and a capacitor. The first switch is coupled between an inverting input and an output of the amplifier to provide a negative feedback loop around the amplifier when the first switch is closed. The capacitor has a first end coupled to the inverting input, and a second end coupled to the second switch, where the capacitor is charged to a voltage substantially equal to an offset voltage of the amplifier when the second switch is closed. The third switch is coupled to a second end of the capacitor, where the voltage across the capacitor is subtracted from an input loop of the reference circuit to cancel the offset voltage of the amplifier when the third switch is closed.
First Claim
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International Classification(s)
- 2013 Application Filing Year
- H03K Class
- 2259 Applications Filed
- 1924 Patents Issued To-Date
- 85.18 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- H03K Class
- 0 % this patent is cited more than
- 10 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Dec 23, 2026 |
