Digital pulse width modulation power supply with pico second resolution
US9793683B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2016 |
| Grant date | Oct 17, 2017 |
| Priority date | — |
| Expiry date | Aug 19, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/4018
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A laser system includes a laser generation element and a pulse width modulated (PWM) signal generator that uses a clock to generate a control signal having a period based on the clock frequency and includes a pulse width between a rising edge and a falling edge. The system also includes a switch mode power supply controlled by the control signal output by the PWM signal generator for providing power to the laser generation element based on the control signal. Also, the system includes a signal modification circuit that selectively delays the rising edge of each period of the control signal by one of one or more selectable durations thereby reducing the pulse width by a quantity, wherein the quantity is smaller than a minimum increment amount that the pulse width is able to change based on the clock frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.