Low power radio frequency envelope detector
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United States of America Patent
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Mar 21, 2017
Grant Date -
N/A
app pub date -
May 3, 2016
filing date -
May 3, 2016
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Abstract
A low power radio frequency envelope detector includes a charging transistor for controlling the charge supplied to an output capacitor. A first input capacitor couples an input signal to a gate of the charging transistor. A second input capacitor couples a first polarity of the input signal to a first diode such that the first diode is operable to couple charge to the first input capacitor and to the gate of the charging transistor in response to a positive excursion of the first polarity of the input signal. A third input capacitor couples a second polarity of the input signal to a second diode coupled in series with the first diode. The first and second diodes are operable to couple charge to the first input capacitor and to the gate of the charging transistor in response to a positive excursion of the first polarity of the input signal.
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