Abstract: The object of this invention are bistable, monostable and astable multivibrator in which the switching transition level is stable and relatively independent of ambient temperature. This reduction is accomplished by using an auto-zero amplifier system with an input offset voltage of substantially zero volts.

Abstract: This invention relates to oscillators employing a primary feedback network and a high pass filter feedback network. The feedback networks are connected between the input and output of a of a high signal gain amplifier system. The primary feedback network provides positive feedback to cause oscillation to occur and also determines the nominal frequency of oscillation. The high pass filter feedback network provides a negative feedback signal that controls the rise and fall time of the amplifier system's output signal. By varying the output signal's rise and fall time the frequency of oscillation is also changed. The high signal gain amplifier system operates with one or more amplifier stages in the non-linear region to produce a significantly distorted sine wave or pulse output signal.

Abstract: A Field Effect Transistor (FET) signal delay system with increased propagation delay time stability. This is accomplished by using a controlled voltage supply to power the amplifier stage. This voltage changes as the FET amplifier temperature increases in order to reduce the variation in propagation delay time, caused by the amplifier's gain and phase shift changes. By using this compensated amplifier as the delay element of a signal delay system, the propagation delay time stability is increased.

Abstract: A FET oscillator with increased frequency stability. This is accomplished by using a controlled voltage supply to power the amplifier stage of the oscillator. This voltage changes as the FET amplifier temperature increases in order to reduce the variation in frequency, caused by the amplifier's gain and phase shift changes. By using this compensated amplifier as the active section of an oscillator, the oscillator frequency stability is increased.

Abstract: A fixed frequency resonant mode DC to DC converter maintains a constant DC output voltage using a saturable inductor or saturable transformer in series with an inductor and capacitor. The output voltage of the converter is derived from the voltage drop across the saturable inductor or saturable transformer. The series inductor and capacitor force current through a switch to have a value of zero. The switch is then operated when the current through it is zero.

Abstract: An electronic power supply converts alternating current to a regulated DC voltage with high efficiency. A switch connects the input AC to a DC output capacitor when the input voltage is greater than the output voltage and the output voltage is less than a set point value. The switch receives the input AC and rectifies the input voltage and applies the switch rectified voltage to the output. The voltage difference between the input voltage and the output voltage level at which the switch closes varies in accordance with the input and output voltages.

Abstract: An electronic power supply that converts alternating current to a regulated DC voltage with high efficiency is accomplished by a switch that connects the input AC power source directly to the DC output filter capacitor. This occurs when the input voltage equals the output voltage, and the output voltage is less than the set value.This power supply can be used with low impedance AC power sources capable of providing high surge currents such as commercial utility lines.

Abstract: A switching amplifier wherein the high frequency carrier voltage modulated by an audio input signal is passed through a transformer. The carrier voltage is demodulated and non-audio signals are removed. The audio signal is then recovered and fed to speaker means.

Abstract: A high speed link controller (HSLC) and a number of work stations are coupled in common to a single conductor coaxial cable. Apparatus generates data signals at high speed for transfer of information between the link controller and the work stations with reduced reflections.

Abstract: An interactive terminal data processing system includes a number of work stations, all coupled in common to a single conductor coaxial bus which may be up to one kilometer in length. Work stations may be connected to the bus by up to a ten foot coaxial cable with the connection to the bus being typically no less than thirty feet apart.