Abstract: In a hue control circuit for controlling the phase between a color synchronizing signal and a chrominance signal by a setting element (57), this phase control is obtained without the amplitude being influenced, by deriving (via 17) from the original color synchronizing or chrominance signal a color synchronizing or chrominance signal whose phase is shifted through 90.degree. and by controlling the amplitude of each of these color synchronizing or chrominance signals and adding these signals together (in 35). One color synchronizing or chrominance signal is amplitude-controlled cosinusoidally (by 25) and the other color synchronizing or chrominance signal is amplitude-controlled sinusoidally (by 13) by means of the setting element (57).

Abstract: A circuit for transmitting in opposite directions two pulse-shaped signals via one connecting terminal(K) of a semiconductor body. When one signal is transmitted the signal path for the other signal is inhibited, which is accomplished by means of switching means (1, 2, 3, 4). A possible use of said circuit is one in which, via the same connecting terminal, a synchronizing signal for synchronizing the field deflection in a television receiver is first applied to the semiconductor body and a blanking pulse is produced from said body thereafter.

Abstract: A television receiver including a synchronizing arrangement for providing line and field drive pulses for line and field output stages, which synchronizing arrangement comprises a line oscillator control circuit for controlling the frequency and/or phase of a line oscillator the output signal of which is divided by a divider circuit to produce pulses of field frequency. The divider pulses are applied to a field coincidence stage together with received field synchronizing pulses where their phases are compared and the number of times there is coincidence is counted by a counter and to a controllable switch which also receives field synchronizing pulses from a field oscillator which is driven by received field synchronizing pulses.

Abstract: In a control circuit having an emitter-coupled pair of transistors, to the base whereof a control voltage is supplied and whose emitter circuit is controlled by a signal source, the control voltage is also supplied to the emitter circuit to obtain a lower direct current through the transistor pair for a larger gain so that unwanted variations in the output d.c. voltage level are reduced.

Abstract: Synchronizing circuit arrangement, for example for line synchronization in a television receiver, including digital means, the frequency of the oscillator being twice that of the signal to be synchronized. A frequency divider circuit, for example a master-slave flipflop, produces two output signals one of which serves as a reference signal for the phase discriminator whilest the other is applied together with the input signal of the circuit to a coincidence stage.

Abstract: A line synchronizing circuit including a gated phase discriminator. Because the circuit may lock in to an equalizing pulse, which may give rise to a vertically divided image, gating is rendered inoperative for a given time after the post-equalization time.