Voltage-controlled oscillator gain calibration for two-point modulation in a phase-locked loop
US7612617B2 · kind B2 · utility
9Cited by
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20Claims
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Key dates
| Filing date | Mar 1, 2008 |
| Grant date | Nov 3, 2009 |
| Priority date | — |
| Expiry date | Apr 26, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03C3/0991
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A phase-locked loop (PLL) is arranged to receive high-pass data at a first input and low-pass data at a second input. A first digital input is coupled to a primary path through a digital-to-analog converter (DAC) and a second digital input is coupled to a feedback path of the PLL. The controller provides the first input and the second input during a calibration procedure. The controller adjusts first and second control inputs in an attempt to keep the input voltage to a voltage-controlled oscillator (VCO) in the PLL constant while determining the gain of the VCO in Hz/LSB.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.