Patent
Variable relaxation oscillator having time constant circuit dependent on power supply variations
TLDR
In this article, an electronic switching arrangement for an electronic pulse generator, which has a condenser and a resistor as pulse frequency determining members, was presented, where a series connection of a second transistor and a second resistor was connected in parallel with the time determining resistor associated with the first transistor.Abstract:
An electronic switching arrangement for an electronic pulse generator, has a condenser and a resistor as pulse frequency determining members, the condenser and the resistor being controlled by an active electronic element such as a first transistor. A series connection of a second transistor and a second resistor is connected in parallel with the time determining resistor associated with the first transistor and the pulse generator. A Zener diode is connected to the base of the second transistor to provide a predetermined voltage-dependent control of the second transistor.read more
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Oscillator circuit for generating an output signal having successive cycles which unidirectionally vary in frequency
TL;DR: In this article, an oscillator is arranged to generate cycles of an output signal which have a frequency in accordance with the potential across a first capacitor of the oscillator, and a quantum of energy is transferred from a second capacitor, having a small capacitance value with respect to the capacitance values of the first capacitor, after each cycle of the signal from the oscillators.
References
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Patent
Phase-coherent frequency-shift modulation system for oscillation multivibrator
TL;DR: In this article, a modulation system for a free-oscillating multivibrator consisting of an operational amplifier having a first non-phase inverting input, a second phase-inverting input and an output, combined with two feedback circuits respectively coupling said output to said first and second inputs.