Method and systems for high-precision pulse-width modulation

Patent metadata

Field	Value
Publication number	US-8994426-B2
Application number	US-201213600933-A
Country	US
Kind code	B2
Filing date	Aug 31, 2012
Priority date	Aug 31, 2012
Publication date	Mar 31, 2015
Grant date	Mar 31, 2015

Abstract

In various embodiments, systems and methods for generating high-precision pulse-width modulation include a delay-locked loop comprising multiple delay units having time-variable delays, control logic for selecting a subset S of the multiple delay units to thereby generate a time-invariant shift amount having a precision finer than that of a system clock and circuitry for applying the shift amount to rising and falling edges of a pulse-width modulation waveform to thereby generate a high-precision pulse-width modulation waveform.

First claim

What is claimed is:

1. A method for generating high-precision pulse-width modulation, the method comprising:
calibrating a delay line of a delay-locked loop to a system clock according to a calibration code, wherein the delay-locked loop includes a plurality of delay units, each delay unit having a delay that may vary with time;
determining a desired number of partitions of the system clock;
selecting a subset of the partitions, wherein the subset of the partitions corresponds…

Assignees

• Bhaumik Wreeju
• Gopalrao Senthil Kumar Devandaya
• Analog Devices Inc

Inventors

• Bhaumik Wreeju
• Gopalrao Senthil Kumar Devandaya

Classifications

• H03L7/0816

  Electricity · mapped topic

• H03L7/0814

  Electricity · mapped topic

• H03K7/08

  Electricity · mapped topic

• H03L7/0805

  Electricity · mapped topic

• H03L7/08

  Electricity · mapped topic