Abstract: To simplify the circuitry in a television signal receiver having a radio-frequency tuner (1) and at least two subsequent surface-acoustic wave filters (2, 3), in which the radio-frequency tuner (1) filters a radio frequency television signal applied to its input and converts it to an intermediate-frequency television signal which is coupled to the surface-acoustic wave filter (2, 3), the radio-frequency tuner (1) has at least two outputs (6, 7) which supply the IF television signal converted to the intermediate frequency. Each output (6, 7) is associated with a switch (8, 9) for switching the associated output (6, 7) to a fixed reference potencial. A first input (10; 12) of the two surface-acoustic wave filters (2, 3) is coupled to a first output (6) of the radio-frequency tuner (1), and a second input (11; 13) of the two surface-acoustic wave filters (2, 3) is coupled to a second output (7) of the radio-frequency tuner (1).

Abstract: A circuit arrangement, for supplying an antenna signal to a receiver arrangement of a video recorder and/or to a television receiver, connected to the video recorder, includes a switching device by which, in the blocked state, the antenna signal can be applied only to the receiver arrangement of the video recorder and from this video recorder to the television receiver, and by which, in the conducting state, the antenna signal can be applied directly to the television receiver via this video recorder. To avoid unwanted low impedances at the input and the output, the switching device includes a series arrangement of, successively, a first capacitive switching element having a constant capacitance, at least one pair of second capacitive switching elements and a third capacitive switching element having a constant capacitance.

Abstract: A circuit arrangement includes a tuner and a splitter-modulator having a splitter and a modulator. The splitter includes an RF signal input for receiving an RF input signal, an RF signal output for supplying an RF output signal, a first line for applying the RF input signal to the tuner and a second line for receiving an RF output signal from the modulator. The tuner is adapted to demodulate the RF input signal, and the modulator is adapted to convert a baseband signal into the RF output signal to be supplied by said modulator. The circuit arrangement further includes devices for generating reference oscillations for the tuner and the splitter-modulator, these devices having at least one quartz crystal which is common for the tuner and the splitter-modulator, and a phase-locked loop which is common for the tuner and the splitter-modulator.

Abstract: A circuit arrangement for optionally applying an antenna signal to a receiver section of a video recorder or to a television receiver connected to the video recorder, by a switching device enabling the antenna signal to be applied only to the receiver section of the video recorder and to be passed from the video recorder to the television receiver in the blocked state of said switching device, and enabling the antenna signal to be applied directly to the television receiver in the conducting state of the switching device. A loop-through of the antenna signal to the television receiver will then also be possible when the video recorder does not convey any current.

Abstract: A circuit arrangement comprising a tuner and a splitter-modulator, the latter made up of a splitter and a modulator, the splitter having an RF signal input for receiving an RF input signal, an RF signal output for supplying an RF output signal, and a first line for applying the RF input signal to the tuner. A second line is provided for supplying an RF output signal from the modulator. The tuner is adapted to demodulate the RF input signal and the modulator is adapted to, convert a baseband signal into the RF output signal to be supplied by the modulator. Devices for generating reference oscillations for the tuner and the splitter-modulator have one quartz crystal which is common to the tuner and the splitter-modulator. This results in a reduction in the number of components, particularly for generating the oscillations.