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Title: Precision digital pulse phase generator

A timing generator comprises a crystal oscillator connected to provide an output reference pulse. A resistor-capacitor combination is connected to provide a variable-delay output pulse from an input connected to the crystal oscillator. A phase monitor is connected to provide duty-cycle representations of the reference and variable-delay output pulse phase. An operational amplifier drives a control voltage to the resistor-capacitor combination according to currents integrated from the phase monitor and injected into summing junctions. A digital-to-analog converter injects a control current into the summing junctions according to an input digital control code. A servo equilibrium results that provides a phase delay of the variable-delay output pulse to the output reference pulse that linearly depends on the input digital control code.
  1. (Livermore, CA)
Issue Date:
OSTI Identifier:
Regents of University of California (Oakland, CA) LLNL
Patent Number(s):
US 5563605
Contract Number:
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Country of Publication:
United States
precision; digital; pulse; phase; generator; timing; comprises; crystal; oscillator; connected; provide; output; reference; resistor-capacitor; combination; variable-delay; input; monitor; duty-cycle; representations; operational; amplifier; drives; control; voltage; according; currents; integrated; injected; summing; junctions; digital-to-analog; converter; injects; current; code; servo; equilibrium; results; provides; delay; linearly; depends; phase delay; control voltage; generator comprises; reference pulse; output pulse; operational amplifier; digital control; digital-to-analog converter; phase monitor; crystal oscillator; analog converter; /342/