Patent
Switching supply with pulse width and rate modulation
George A Gautherin,Sol Greenberg +1 more
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TLDR
In this article, a switching type power supply is described which employs pulse width and rate modulation, and an enhanced control range is achieved by controlling a frequency determining circuit to increase operating frequency as a function of power switch pulse width.Abstract:
A switching type power supply is described which employs pulse width and rate modulation. Enhanced control range is achieved by controlling a frequency determining circuit to increase operating frequency as a function of power switch pulse width. The power switch controls the switching of primary current in a transformer whose secondary supplies the output via a rectifier/filter circuit.read more
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References
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Patent
Switching regulator power supply
TL;DR: In this paper, a switching regulator electronic power supply for 115 volt A.C. operation rectifies and filters to provide approximately 170 volts of unregulated D.C to the primary winding of a power conversion transformer.
Patent
Stabilizing power source apparatus
TL;DR: In this article, a stabilizing power source apparatus consisting of a transformer (T3) with one primary (Np) and two secondary coils (Ns), a switching transistor (Q1), first and second differential amplifiers (A, A2), an oscillator (OSC'), and a pulse modulator (PM) is described.
Patent
Tuned switched-mode power supply
TL;DR: In this paper, the duration of the conducting period of a bidirectional switch as a function of the output voltage is controlled. But the switch-off pulses have a substantially pre-determined time duration which is longer than half a cycle of the tuning frequency.
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Switching power supply
TL;DR: In this paper, a switching power supply has a power switching transistor furnishing a series of shaped pulses to output means for providing an output voltage, has control means including a voltage controlled oscillator responsive to the output voltage for providing control pulses whose frequency is representative of output voltage level, and has saturable transformer means coupling the control pulses to the switching transistor for driving the transistor to regulate the voltage within a selected range.
Patent
Efficiency increasing circuit for switching power supplies operating at low power levels
TL;DR: In this article, a p.w.m. type power supply is used to increase the efficiency by eliminating some of the pulses used to drive the power switching means of the supply.