Patent ID: 9601995
Date: 2017-03-21
CPC Classifications: G01R,H03K

Claim:
1. A circuit, comprising: a charging transistor for controlling the charge supplied to an output capacitor wherein the charge supplied to the output capacitor generates an output envelope signal; a first input capacitor for coupling an input signal to a gate of the charging transistor; a second input capacitor for coupling a first polarity end of the input signal to a first diode, wherein 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 end of the input signal; and a third input capacitor for coupling a second polarity end of the input signal to a second diode coupled in series with the first diode, wherein the first and second diode 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 second polarity end of the input signal.