초록 ▼

A pulse width modulation (PWM) controller suitable for use with a variety of open loop topology power supply circuits including ring generator circuits. The controller and the circuit realized therefrom utilizes an open loop topology to achieve the desired output voltage waveform. The PWM controller

A pulse width modulation (PWM) controller suitable for use with a variety of open loop topology power supply circuits including ring generator circuits. The controller and the circuit realized therefrom utilizes an open loop topology to achieve the desired output voltage waveform. The PWM controller is suitable for realizing a plurality of different open loop converter topologies such as such as buck, boost, forward and push-pull topologies. The PWM controller is adapted to provide the required signals to control the various possible open loop converter topologies. The controller functions to generate a PWM signal that is used to generate a half wave sine wave signal. The controller includes the necessary functionality to control the duty cycle of the generated PWM signal so as to produce a full wave sine wave at the output of the output bridge circuit.

대표청구항 ▼

[ What is claimed is:] [1.] A controller for controlling a DC to AC open loop pulse width modulation (PWM) converter circuit, said controller comprising:sampling means for generating a digital number representative of the magnitude of a source of electrical power, denoted by V.sub.IN ;output voltage

[ What is claimed is:] [1.] A controller for controlling a DC to AC open loop pulse width modulation (PWM) converter circuit, said controller comprising:sampling means for generating a digital number representative of the magnitude of a source of electrical power, denoted by V.sub.IN ;output voltage generator means for generating a digital representation of a desired output voltage, denoted by V.sub.OUT ;processing means for determining the duty cycle D of a PWM signal as a function of K, N, V.sub.IN and V.sub.OUT ; andpulse width modulation means for generating said PWM signal in response to the duty cycle generated by said processing means.