Multiple scanning type television receiver

DETAILED DESCRIPTION The above problem is overcome by the present invention which is intended for use in combination with a horizontal deflection circuit of a multiple scanning type television receiver which is designed to be able to receive video signals having different line frequencies in addition to the reception of the standard television broadcasting.
Such a horizontal deflection circuit has means for switching the horizontal frequency of the horizontal deflection circuit and the capacity value of an S-shaping capacitor by an output signal from a frequency to voltage converter which detects the frequency of the horizontal sync.
input signal and converts the same to a corresponding voltage.
The invention comprises a detector to detect this switching time point and to cut off the power supply source to the output switching device of the horizontal deflection circuit during a transient period obtained from the detector, to thereby reduce transient currents generated in the horizontal output circuit when the horizontal frequency of the television signal is switched.
It is therefore an object of the present invention to provide a reliable horizontal deflection circuit for a multiple scanning type television receiver.
It is a further object to provide a horizontal deflection circuit for a multiple scanning type television receiver wherein current transients during switching from one scanning rate to another are substantially eliminated.
These and other objects, features and advantages of the present invention will become apparent from the following detailed description of the preferred embodiment taken in conjunction with the accompanying drawing, throughout which like reference numerals designate like elements and parts .