Envelope detector circuit
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United States of America Patent
Stats
-
Jun 7, 2016
Grant Date -
May 21, 2015
app pub date -
Nov 6, 2014
filing date -
Nov 18, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An envelope detector circuit, suitable for use in RFID tags, includes a voltage doubler circuit and a biasing voltage generating circuit which comprises components matched respectively to rectifying components of the voltage doubler circuit. A rectifying component of this voltage doubler circuit is formed by a transistor controlled by the biasing voltage generating circuit which provides a biasing voltage to a control gate of this transistor, the biasing voltage generating circuit being arranged so as to permit a determined forward biasing current to flow through the transistor and further rectifying elements of the voltage doubler circuit. This embodiment provides fast, highly sensitive detection of envelope waveforms in input signals. Thanks to the matched rectifying components, efficiency variations due to variations in manufacturing process can be eliminated. The envelope detector circuit is further arranged for maintaining a stable detection independent of variations in temperature.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2014 Application Filing Year
- H04L Class
- 29135 Applications Filed
- 23333 Patents Issued To-Date
- 80.09 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 4 Citation Count
- H04L Class
- 8.87 % this patent is cited more than
- 9 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 7, 2027 |
