06229366 is referenced by 91 patents and cites 69 patents.

A pulse width modulated switch comprises a first terminal, a second terminal, and a switch that allows a signal to be transmitted between the first terminal and the second terminal according to a drive signal provided at a control input. The pulse width modulated switch also comprises a frequency variation circuit that provides a frequency variation signal and an oscillator that provides an oscillation signal having a frequency of that varies within a frequency range according to the frequency variation signal. The oscillator further provides a maximum duty cycle signal comprising a first state and a second state. The pulse width modulated switch further comprises a drive circuit that provides the drive signal when the maximum duty cycle signal is in the first state and a magnitude of the oscillation signal is below a variable threshold level.

Title
Off-line converter with integrated softstart and frequency jitter
Application Number
9/573081
Publication Number
6229366 (B1)
Application Date
May 16, 2000
Publication Date
May 8, 2001
Inventor
Leif Lund
San Jose
CA, US
Alex Djenguerian
Saratoga
CA, US
Balu Balakirshnan
Saratoga
CA, US
Agent
Blakely Sokoloff Taylor & Zafman
US
Assignee
Power Integrations
CA, US
IPC
H03K 3/017
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