公开(公告)号：US3631464A

公开(公告)日：1971-12-28

申请号：US3631464D

申请日：1969-03-21

申请人： SINGER GENERAL PRECISION

发明人： DAHLBERG ROGER C

IPC分类号： G03F3/08 ,  H03M9/00 ,  G06F5/04

CPC分类号： H03M9/00

摘要： The disclosed embodiment of the present invention is a digital parallel to serial converter for a television raster display which employs a phase-locked loop for controlling the conversion rate. The disclosed converter is formed of a register which receives data in parallel form, a plurality of transfer gates for transferring data out of the register, and a frequency controlled gating circuit for enabling the transfer gates. The frequency controlled gating circuit is formed of a voltage controlled oscillator having an output connected to a counter, which is, in turn, connected to a decoder from which the gating pulses are derived for enabling the transfer gates. A flip-flop is connected to the counter and to a clock, such that the DC average value of an output thereof forms a feedback control for the oscillator.