Optical reading of quantum well device

Optical signal modulators

Optical waveguide modulator using single crystals of TlGaSe.sub.

Optoelectronic modulator

Oscillator and modulator arrangements on a circuit board

Oscillator mixer circuit with reaction-tree coupling

Parametric frequency converter

Pattern indication using laser beam

Phase conjugation using internal reflection

Phase control circuit including an operational transconductance

Phase displacement modulator

Phase displacement modulator having four quadrant phases

Phase lock-loop modulator using an arithmetic synthesizer

Phase locked loop angle modulation system with large modulation

Phase locked loop circuit

Phase locked loop frequency and phase modulators

Phase locked loop frequency modulator

Phase locked loop frequency synthesizer and frequency modulator

Phase modulated square wave generator

Phase modulating with odd and even finite power series of a modu