U.S. Philips Corporation

Klaus G Juhnke

Hartmut S Harlos

Peter Kelting

Control circuit for calibrating a delay line for a television receiver. The delay line contains series-connected all-pass sections of at least 2nd-order, the inductances of which are replaced by gyrators to which capacitances are connected. During at least one line of the vertical blanking period, the delay line is included into a phase-lock loop for comparison with a line-frequency signal in order to control the delay time of the all-pass sections.

Control circuit for calibrating a delay line

In a television receiver circuit arrangement for several standards, the identification circuits are switched on one after the other by a test cycle actuating signal which is maintained when the standard has been identified.

Television receiver circuit arrangement for identifying the standard

A circuit for generating an output pulse with a delayed edge includes a differential amplifier supplied with current by a current source transistor amplifier whose base drive current is delayed by connecting a small capacitor between its base and collector electrodes.

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Rellingen, Germany

Klaus G Juhnke