Abstract: Disclosed is an AGC detector device and an AGC detecting method for television receivers displaying video pictures consisting of a plurality of horizontal lines to be built up successively, wherein a CVBS signal is inputted which includes horizontal sync pulses having a front porch region and a back porch region and occurring once a horizontal line during a horizontal sync period when generating a current video picture, and further includes vertical sync pulses occurring during a vertical sync period before the generation of a new video picture and including serration pulses which occur during a serration pulse region being part of the vertical sync period. Further, gating pulses are generated having a period which is equal to the line period of the horizontal sync pulses. Said gating pulses are adjusted such that they occur at the back porch region of the horizontal sync pulses.

Abstract: The invention relates to a digital phase locked loop (PLL) 12 for demodulating an intermediate frequency signal. The digital phase locked loop 12 comprises two coordinate rotation digital computers 24 and 30 in its phase detector. The robustness the PLL 12 can be improved by means of a gain control circuit 27, a sign detector 20, a carrier monitoring circuit 28 and an adjustable loop filter 32.

Abstract: The invention relates to a digital phase locked loop (PLL) 12 for demodulating an intermediate frequency signal. The digital phase locked loop 12 comprises two coordinate rotation digital computers 24 and 30 in its phase detector. The robustness of the PLL 12 can be improved by means of a gain control circuit 27, a sign detector 20, a carrier monitoring circuit 28 and an adjustable loop filter 32.

Abstract: Disclosed is an AGC detector device and an AGC detecting method for television receivers displaying video pictures consisting of a plurality of horizontal lines to be built up successively, wherein a CVBS signal is inputted which includes horizontal sync pulses having a front porch region and a back porch region and occurring once a horizontal line during a horizontal sync period when generating a current video picture, and further includes vertical sync pulses occurring during a vertical sync period before the generation of a new video picture and including serration pulses which occur during a serration pulse region being part of the vertical sync period. Further, gating pulses are generated having a period which is equal to the line period of the horizontal sync pulses. Said gating pulses are adjusted such that they occur at the back porch region of the horizontal sync pulses.

Abstract: In a multi-standard television receiver in which a picture signal contained in a television signal and modulated on a picture carrier is converted to a picture signal intermediate frequency, and a stereo sound signal or two-tone signal contained in the television signal and modulated on two sound carriers is converted to two first sound signal intermediate frequencies, it is ensured for possibly simple filtering of the sound signals, also at different frequency spacings between the picture carrier and the sound carriers, that two sound signal filters (8, 9) having a fixed, predetermined filter central frequency are provided for filtering the stereo sound signal, and that frequency shift circuitry (6) is provided which, in dependence upon the frequency spacing between the picture carrier of the television signal and its sound carriers, shifts the picture carrier contained in the picture signal converted to the IF position to such a frequency that the sound IF signals of the first sound intermediate frequencies

Abstract: Device for the positionally correct feeding of test strips to an analysis unit. The test strips 10 include a base layer and at least one raised test field fixed to one side of the base layer. The test strips are contained disordered with respect to their longitudinal axis rotation position in a storage container. A separation and position correcting device 1 serves to feed the test strips 10 individually one after the other in a defined position to the analysis unit. Simplicity of construction and reliable operation are achieved due to the fact that the separation and position correcting device 1 includes a position correcting stage 30 with two rolls, between which a narrow gap 35 exists. The rolls rotate so that the surface 31a of the first roll 31 moves in the region of the gap 35 from top to bottom, while the surface 32a of the second roll 32 moves from bottom to top. The first roll 31 includes peripheral raised webs 37 which are in alignment with test field-free regions of the test strips 10.

Abstract: For an integratable FM demodulator which has an optimal noise behavior and does not require any balancing, the demodulator includes a marker pulse generator (2) having an integrator (22) which is succeeded by a comparator (23), while at the start of each positive and/or negative edge of the limited FM signal, a marker pulse is started and one of a first and second reference signals is applied to the integrator input until a predetermined edge of the reference clock signal appears, and the first and a second reference signals are subsequently applied alternately to the integrator input in dependence upon a reference clock signal applied to the marker pulse generator, the two reference signals being applied to the integrator input during the desired period of time of the marker pulse, each time during equal overall time intervals, and a comparison voltage occurring at the integrator output at the end of the desired period of time, which comparison voltage is detected by the comparator (23), whereupon the starte

Abstract: A processing section for a television receiver for processing stereo/dual sound signals having a first sound carrier modulated by a first sound signal, and a second sound carrier modulated both by a second sound signal and by a pilot signal which, in turn, is modulated by a stereo/dual sound identifying signal. The processing section does not require a reference frequency from the synchronizing or intermediate frequency portion of the television receiver for recovering the pilot signal, but, rather, uses the pilot signal to control an oscillator in a phase-locked loop which loop is used to generate a signal for down-converting the frequency range of at least the modulated second sound carrier thereby obviating the need for expensive, precision filtering components.