Abstract: Camera systems are often built up from a base station, a detachable cable, and a camera. A dangerous situation may arise the moment the cable is detached from the camera because there is (still) a voltage present on the cable. The invention provides a camera system in which this problem is solved by means of a safety circuit capable of detecting from the base station whether a camera is connected to the cable or not.

Abstract: An image camera (e.g. a professional or consumer camera/camcorder, an electronic still picture camera) comprises a frame memory (82) between its image sensor (2) and an electronic signal-processing circuit (3). A scene can be “frozen” in response to a remote control command (91). Critical adjustments (e.g. skin colour) can now be carried out without requiring persons acting in the scene to stand still. Adjustments can also be carried out on the basis of an image in which the camera operator himself acts in the scene.

Abstract: Camera systems are often built up from a base station, a detachable cable, and a camera.

Abstract: A power supply system comprising an a.c. voltage source (ACS), a load (LL) and a detachable (DCC) cable connection (CC). In order to prevent a dangerously high a.c. voltage from occurring between cable conductors (CC1, CC2) when the cable connection is loose, a safety circuit (CITSR) is provided which includes an on/off switching circuit (S1, SR1, S2, SR2). The safety circuit (CITSR) includes a parallel arrangement (CI) of at least one capacitor (C) and a direct current source (I). The parallel arrangement (CI) is part of a direct current circuit (CC2, DC2, CC1, S1, DC1, CC2) which is closed via the cable conductors (CC1, CC2), the a.c. voltage source (ACS) and the load (LL). The parallel arrangement (CI) is coupled to the on/off switching circuit (S1, SR1, S2, SR2) via a threshold circuit (TC). When a controllable a.c.

Abstract: A color television encoding circuit suitable for use in a color television system in accordance with the NTSC or the PAL-standard. For the purpose of readjusting both the frequency and the phase of the line oscillator the circuit comprises only one control loop incorporating a phase comparison stage for detecting the difference of the phase of the chrominance subcarrier in the chrominance signals with respect to its zero value at the instant at which the leading edge of the synchronizing pulse reaches half the amplitude thereof. The output signal of the phase comparison stage is sampled once in every 2n line periods, where n is an integer, which results in the control signal for the line oscillator.

Abstract: A circuit for generating a sawtooth current (I) in a coil (25), the coil (25) being driven during the trace periods of the sawtooth from an amplifier circuit (4, 6, 7, 9, 15) by a current, and during the shortest possible retrace periods, the amplifier circuit being blocked, the coil (25) being included in a resonant circuit (25, 20, 21, 18, 7) which further comprises a capacitor (20), a first (21) and a second diode (18) and a transistor (7). In order to prevent disturbing ringing phenomena from occurring when a retrace period of the shortest possible duration is required, the junction of the capacitor (20), the first (21) and the second diode (18) and the transistor (7) is fed-back via a resistor (23) to a signal input of an amplifier (4) comprised in the amplifier circuit (4, 6, 7, 9, 15), this signal input further being coupled to a terminal (1) for the supply of a sawtooth voltage.

Abstract: A television camera comprising a television pick-up tube and an anti-microphonics circuit provided with a microphonics detection circuit (17) having a voltage-controlled oscillator included in a phase-locked loop circuit. The detection circuit (17) is not only used for switching on or off (15) the microphonics correction (14) but, as the circuit comprises a phase-locked loop resulting in a proper detection it is also possible to generate a test signal (24) by means of which the microphonics correction signal can be given the optimum phase via an automatic phase adjusting circuit (27). The microphonics correction circuit (14) comprises a low-pass filter (47-52) and a phase shifting network (53-60) for an independent adjustment of the amplitude and the phase.