Blakely, Sokoloff, Taylor & Zafman
Phase controlled oscillator including a phase lock loop and dual sweep oscillators
 A phase controlled oscillator comprises a first sweeping oscillator producing an output voltage controlled by a control input signal and a first sweeping signal within a limited output voltage amplitude, a second sweeping oscillator which produces a second sweeping signal having an amplitude smaller than that of the first sweeping signal supplied to a phase locked loop, the phase relation of input and output signals of the second sweeping oscillator being selected such that it stops oscillation when the loop is in a locked state, and a control circuit adapted to hold the output voltage of the first sweeping oscillator. 
Nippon Electric Co., Ltd.
H
H03L
inventional
Toyosaka
Yamasaki