An Electronic Phase Shifter Having a Constant Magnitude Output.
DEPARTMENT OF THE NAVY WASHINGTON DC
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An electronic phase shifter for shifting the phase of a sine wave at an input terminal as measured at an output terminal without affecting the magnitude thereof and having the ability to operate over a wide range of input voltages is disclosed. The electronic phase shifter comprises, inter alia, an operational amplifier and a unique variable output resistance device. A control signal, in the form of a current, for controlling the phase shift of the sine wave is applied to the input of the variable output resistance device. Buffering of the electronic phase shifter from preceding stages is controlled by matched resistors operatively connected between its output and input terminals and the inverting input terminal of the operational amplifier. The operating frequency range of the electronic phase shifter and, accordingly, the phase shift range, is controlled by a capacitor connected from its input terminal to the non-inverting input terminal of the operational amplifier. Author
- Electrical and Electronic Equipment