HALF SINE WAVE RESONANT DRIVE CIRCUIT
First Claim
Patent Images
1. A drive device providing improved operation and control of duty cycle, the drive device comprising:
- switching means providing operation at a duty cycle based upon a drive signal; and
a gate drive means for producing from an input signal a half sine wave output signal for use as the drive signal to the switching means, the gate drive means having a resonant circuit coupled to a gate of the switching means.
2 Assignments
0 Petitions
Accused Products
Abstract
A half sine wave resonant drive circuit provides a greater duty cycle range of operation without a loss in power, particularly at higher frequencies. A resonant circuit is capacitivly coupled to a single switching device to provide the greater duty cycle range by recycling the gate charge of the switching device through the resonant circuit. A half sine wave drive signal is thereby produced from an input square wave signal. The driving amplitude is constant for operation over the range of duty cycles.
-
Citations
21 Claims
-
1. A drive device providing improved operation and control of duty cycle, the drive device comprising:
-
switching means providing operation at a duty cycle based upon a drive signal; and
a gate drive means for producing from an input signal a half sine wave output signal for use as the drive signal to the switching means, the gate drive means having a resonant circuit coupled to a gate of the switching means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A half sine wave drive circuit providing improved independent amplitude and duty cycle control without power loss at higher operating frequencies, the half sine wave drive circuit comprising:
-
a MOS controlled device to be switched to provide a duty cycle of between about 25 percent and about 50 percent; and
a resonant drive circuit capacitivly coupled to a gate of the MOS controlled device for providing from a periodic input signal a half sine wave output signal for driving the MOS controlled device and adapted for operation between an operating frequency and about twice the operating frequency of the periodic input signal to thereby switch the MOS controlled device. - View Dependent Claims (11, 12, 13, 14, 15, 16)
-
-
17. A method of controlling the duty cycle of a drive circuit without losing power at higher operating frequencies, the method comprising the steps of:
-
receiving a periodic input signal;
producing a half sine wave output signal from the periodic input signal using a resonant circuit capacitivly coupled to a switching device; and
configuring the resonant circuit to provide the half sine wave output signal to thereby operate the switching device at a duty cycle of between about 25 percent and about 50 percent. - View Dependent Claims (18, 19, 20, 21)
-
Specification