Abstract: A power system for a satellite includes a high power amplifier that has a control input. The high power amplifier has a minimum effective isotropic radiated power. A controller is coupled to the control input. The controller generates a control signal to adjust a saturated power output of the high power amplifier to the minimum effective isotropic radiated power.

Abstract: A power system for a satellite includes a high power amplifier that has a control input. The high power amplifier has a minimum effective isotropic radiated power. A controller is coupled to the control input. The controller generates a control signal to adjust a saturated power output of the high power amplifier to the minimum effective isotropic radiated power.

Abstract: A demodulator for a biphase or quadriphase shift-keying system. The demodulator includes two AND gates for biphase demodulation. The AND gate is one which will provide an output signal if and only if the two input signals are in phase. Each of the AND gates forms a feedback with an injection locked oscillator. Therefore depending on the phase of the input signal, one or the other AND gate provides an output which is then injected at the proper phase into the injection locked oscillator. The output of the AND gates is fed to a data logic and envelope detector to recover the data. For quadriphase phase-shift keying, four AND gates are required. The circuit can be constituted either by transistors or by transferred electron devices sometimes called Gunn effect devices.

Abstract: A parallel or serial analog-to-digital converter utilizing both Gunn effect devices and field effect transistors. The converters are based on a differential pair of amplifiers consisting of two or more Gunn effect devices, one of which is biased close to the knee of the current-voltage characteristic before the negative resistance region. Hence a clock pulse will bias one of the devices into the negative resistance region while the other device is now biased close to the knee to be able to respond to the analog signal. This is due to the fact that both devices are biased by a common constant current source, including a field effect transistor.