Title :
Analog phase measuring circuit for digital CMOS ICs
Author :
Rothermal, A. ; Dell´Ova, F.
Author_Institution :
Thomson Consumer Electron., Villingen, Germany
fDate :
7/1/1993 12:00:00 AM
Abstract :
A circuit measuring the phase of incoming asynchronous signals relative to the system clock in digital signal processing is described. The system clock can be in the range from 10 to 20 MHz, as is typical for video signal processing applications. As a reference in the asynchronous signal the positive or negative slope is taken. Its phase is measured with a resolution of 1/32 of a system clock cycle (approximately 1.5 to 3 ns). Pure digital CMOS technology without precision components is used, to enable combined integration on processor chips. Timing precision (jitter) is better than 200 ps without any adjustments. One external capacitor is needed
Keywords :
CMOS integrated circuits; digital integrated circuits; integrated circuit testing; phase measurement; 1.5 to 3 ns; 10 to 20 MHz; asynchronous signals; digital CMOS ICs; digital signal processing; system clock; CMOS analog integrated circuits; CMOS digital integrated circuits; CMOS technology; Clocks; Digital signal processing; Phase measurement; Semiconductor device measurement; Signal processing; Signal resolution; Video signal processing;
Journal_Title :
Solid-State Circuits, IEEE Journal of
