Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1993-11-05
1995-06-06
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
315411, 348537, 348730, H02J 100
Patent
active
054225892
ABSTRACT:
A circuit for synchronizing an operating clock of a switching power supply (SPS) system is provided. The SPS has an oscillator, a primary control circuit, a secondary voltage generation circuit, a feedback control circuit. The oscillator outputs an oscillation signal to the primary control circuit. The feedback control circuit, in response to a direct current (DC) voltage from the secondary voltage generation circuit, generates a DC feedback voltage signal. The synchronization circuit comprises an isolation device, a signal separation circuit and a triangle-wave generation circuit. The isolation device has an input terminal and an output terminal. The input terminal receives a horizontal synchronization signal and the DC feedback voltage signal. A mixed signal is generated at the output terminal as a result of amplitude-modulating the DC feedback voltage signal by the horizontal synchronization signal. The input terminal is voltage-isolated from the output terminal. The signal separation circuit generates a synchronization signal by filtering out the component of the DC feedback voltage signal of the mixed signal. The triangle-wave generation circuit has an output terminal and an input terminal. The input terminal receives the synchronization signal and the output terminal generates the operating clock of triangle-like shape, which is synchronized with the horizontal synchronization signal, to the oscillator.
REFERENCES:
patent: 4486822 (1984-12-01), Marinus
patent: 4536684 (1985-08-01), Babcock
patent: 4692852 (1987-09-01), Hoover
patent: 4829216 (1989-05-01), Rodriguez-Cavazos
patent: 4994719 (1991-02-01), Lendaro
patent: 5034667 (1991-07-01), Lendaro
patent: 5079666 (1992-01-01), Naim
patent: 5089947 (1992-02-01), Driscoll et al.
Acer Peripherals Inc.
Callahan Timothy P.
Zweizig Jeffrey
LandOfFree
Circuit for synchronizing an operating clock of a switching powe does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Circuit for synchronizing an operating clock of a switching powe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit for synchronizing an operating clock of a switching powe will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-990081