Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Verfahren und Phasenregelkreis zum Synchronisieren eines Ausgangssignals mit einem Eingangssignal unregelmaessiger und/oder stark ausgeduennter Flankendichte

Phase locked loop set-up - synchronises reference signal to input signal by using amplitude samples of reference signal as measure of phase.
 
: Heydt, G.

:
Frontpage ()

DE 1978-2854039 A: 19781212
DE 1978-2854039 A: 19781212
DE 2854039 C2: 19840712
H03L0007
German
Patent, Electronic Publication
Fraunhofer HHI ()

Abstract
DE 2854039 C UPAB: 19930902 The phase locked loop derives sample pulses from the edge changes in the input signal and uses them to sample the instantaneous amplitude of the reference signal. This amplitude bears a given relationship to the phase of the reference signal and is used as a measure of the difference between the input and reference signal for forming the control signal that controls the voltage-controlled oscillator. The reference signal may be sinusoidal, triangular, or an asymmetric sawtooth. The control input of the phase detector is connected to a stage that shapes the sample pulses. A hold capacitor is charged to a wanted value by several samples of the reference signal's amplitude.

: http://publica.fraunhofer.de/documents/PX-75640.html