Oscillators – Ring oscillators
Patent
1983-08-05
1986-01-21
LaRoche, Eugene R.
Oscillators
Ring oscillators
331 34, 331108B, 331143, 307455, H03B 100
Patent
active
045659761
ABSTRACT:
The fall-time of an ECL gate is precisely controlled using a fixed capacitor, which is connected between the positive supply voltage and the ECL gate output terminal, and a variable current source connected between ground and the ECL gate output terminal. A time-delay circuit is obtained by controlling the variable current source with an error voltage of a phase-locked loop such that the time-delay precisely tracks the frequency of the reference signal for the phase-locked loop. A signal detector circuit is obtained by combining time-delay circuits. A voltage-controlled oscillator is assembled by connecting 3 ECL gates with controlled fall-times in a ring oscillator configuration. Addition of a non-inverting input to one ECL gate makes the voltage-controlled oscillator interruptible. Combining a voltage-controlled oscillator of the type described with a phase detector fed by a reference signal provides a phase-locked loop with the control voltage thereof providing a frequency-to-voltage conversion function. A system for providing a receiver clock reference signal from a received signal is provided by phase-locking the output signal of a first phase-locked loop to a system reference signal to generate a first-loop control voltage. A second phase-locked loop is phase-locked to the received signal with a second-loop control voltage. In addition, the second phase-locked loop is also frequency-locked to the system reference signal by the first-loop control voltage. This system is particularly useful for recovering a receiver clock reference from a Manchester-encoded signal.
REFERENCES:
patent: 3396282 (1968-08-01), Sheng et al.
patent: 3522447 (1970-08-01), Borenstein
patent: 3831112 (1974-08-01), Walton
patent: 4015216 (1977-03-01), Masuda
patent: 4030010 (1977-06-01), Schwartz
patent: 4052673 (1977-10-01), Herzog
patent: 4131861 (1978-12-01), Malaviya
patent: 4191932 (1980-03-01), Nagahama
patent: 4233525 (1980-11-01), Takahashi et al.
patent: 4319200 (1982-03-01), Terwilliger
Wise, C. D. et al., "Building an Oscillator Using a Single I.C.", Electronic Design 20, (Sep. 26, 1968), p. 71.
Abdel-Aal, R. E. S., "Pulse Width Detector", Wireless World, v. 85, n. 1526, (Oct. 1979), p. 86.
Hickman, I., "Voltage Controlled Oscillator Using Spare Gates", New Electronics, v. 12, n. 14, (Jul. 10, 1979), p. 40.
Advanced Micro Devices , Inc.
Haynes Mark A.
King Patrick T.
LaRoche Eugene R.
Pascal Robert J.
LandOfFree
Interruptable voltage-controlled oscillator and phase-locked loo does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Interruptable voltage-controlled oscillator and phase-locked loo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interruptable voltage-controlled oscillator and phase-locked loo will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2300272