TH12675A - Synced horizontal sweep at horizontal frequency combination - Google Patents

Abstract

The first phase locked loop circuit generates a first time signal at a frequency. First horizontal sync According to the horizontal sync component in the video signal The commutator circuit receives from the first to the second time signal. There will be a second frequency at the multiplication of the first frequency. And go to the order in the frequency at the first frequency rate The second phase locked loop will receive a second time signal. It is asymmetric within the timing of the first time signal and feedback signal in a combination with the second frequency. It contains a controllable frequency generator for generating a smooth sync signal at a second frequency. Second-order phase-locked loop It is characterized by an indication of the cyclic response determined by the low-range filter. To prevent the voltage regulated frequency generator from changing the frequency as fast as the oscillation rate of the second time signal. This will cause an error signal for the controllable frequency generator to be taken to the mean value. As a result, symmetrical sync signal is corrected at the second frequency. The horizontally released refraction state is connected to the second order phase-locked loop for the second-order sync-up horizontal sweep. There is no need for an additional signal generator circuit. To correct the symmetry of the first time signal generated by the first phase locked loop circuit. Or the symmetry of the second time signal received by the changer

Claims (8)

1. The sync system consists of A first phase locked loop with a first controllable frequency generator and a first comparator for generating the first time signal at the first sync frequency according to the sync component in the video signal. A path for obtaining from such a first time signal. And from the aforementioned first frequency generator it is a second time signal with a second frequency that is a multiple of that first frequency. And was changed at the aforementioned first frequency rate Phase locked loop circuit Second place with a second comparator for such second time signal reception. And feedback signal according to the second frequency And a second controllable frequency generator for generating a sync signal at that second frequency and The output deflection stage connected for receiving such a sync signal at the aforementioned second frequency. And for creating repeating contracts This is related to the feedback signal for the aforementioned second frequency sync sweep. Phase locked loop circuit The aforementioned second order has a hinted loop response to prevent such second-order controllable frequency generators from changing the frequency as fast as the aforementioned rate of change of the second time signal 2. The system of claim 1, where the phase-locked loop The first priority consists of a feedback line for the feedback signal relative to the aforementioned first time signal. 3. A system of claim 1 where the path for the second time signal is connected during phase locked circuits. Loops Such first and second. 4. System of claim 1 where the phase-locked loop The second order consists of a low-range filter for the control of a pressure-regulated frequency generator, such a low-range filter that has a characteristic that determines the frequency that responds to that loop 5. System of claim 1, where The feedback signal of the aforementioned second-order phase-locked loop receives the same pulses from the deflection state. 6. System of claim 1 where the first time signal has a frequency. According to the horizontal sync component in the said signal And that feedback signal relative to horizontal repeating pulses 7. System of claim 1 where the periodic sum of the consecutive pulses of the second time signal in each The pulse interval of the said first time signal is constant. 8. The sync system consists of The first phase-locked loop circuit includes a frequency generator and fH time signal generation, where with the fH sync element in the phase-locked loop image signal. Second with a comparator for 2fH time gain and 2fH feedback, second frequency generator for generating a 2fH horizontal sync signal and deflection state for a 2fH synced sweep connected to the generator. The second such frequency And is connected to the comparator and the path connected between the phase-locked loop. Such first and second responds to the aforementioned fH time signal and the first frequency generator from the phase-locked loop circuit. The above first for generating the aforementioned 2fH time signal is the input to the aforementioned comparator of the phase-locked loop circuit. The second claim 9. System of claim 8 where the aforementioned 2fH time signal is changed, the period of frequency at the fH rate and the phase locked loop. The second order has an implicit cyclic response to prevent the second frequency generator from changing the frequency as fast as the said rate of change of the fH time signal. 1 0. 9 where the path is connected between the aforementioned first and second phase-locked loops consists of a digital circuit 1. 1. System of claim 9, where such second-order phase-locked loop Contains a low-range filter for controlling the aforementioned second frequency generator. The low-range filter is characterized by determining the frequency that responds to that cycle 1 2. The system of claim 8, where such a feedback signal is received a repeating pulse from the state of 1 3. Claim 8 system where the 2fH feedback signal is associated with horizontal repeating pulses 1 4. System of claim 8 where the sum of the period The time of the corresponding pulses of the aforementioned 2fH time signals for each period of the said fH time pulses is constant. 1. 5. Refraction and sync systems consist of: Phase locked loop circuit First with an nfH frequency generator and l / n divider for generating a first time signal at fH and relative to the horizontal sync component in the video signal. The counting path pre-set by the aforementioned first time signal. And responds to the aforementioned nfH frequency generator for obtaining second-time signal at mfH, horizontal deflection state and phase-locked loop. Second place with a comparator for such second time reception. And the feedback signal received from the said horizontal deflection state and the second order frequency generator for generating the sweep sync signal at mfH, that horizontal deflection state is connected to the rated frequency generator. Such two for horizontal sweep are synced at mfH 1. 6. System of claim 15, where n and m are even integers and n is greater than m 1. 7. System of claim at 15 where n is 32 and m is 2. 1. 8. System of claim 15, where such a second-order phase-locked loop circuit consists of a low-range filter for generating a control signal for a second-order frequency generator as say This will protect the second-order frequency generator from the change in frequency as fast as the shift that occurs in the frequency of the second-order signal. 1 9. System of claim 15 where the feedback signal is relative to the pulses. The repeating pulses of the aforementioned horizontal deflection state 2 0. System of the 15th claim, where the sum of the consecutive pulses of the second time signal. For each period, the above first time signal pulses are fixed by 2. 1. The sync system consists of The source of the horizontal sync element of the video signal at the first frequency. The way to connect to the said source For generating a time signal which will be in sync with that horizontal sync element. And at the second-order frequency greater than the aforementioned first frequency, the aforementioned signal is subject to the time error due to the interruption of the said period. Horizontal refraction state and phase locked loop For generating a sync signal swept at the aforementioned second frequency For a synced horizontal sweep by such horizontal deflection state There is a section for comparing the aforementioned timing signals and feedback signals relative to the operation of the horizontal refraction state. Phase locked loop circuit Such a response that is implied. Which literally averaged the said time error at that time in order to truly eliminate the suggestion of such period interference to the said sync signal. 2. System of claim 21 where the second frequency is a multiple of the said first frequency 2 3. The system of claim 21 where the second frequency is the pair multiplier of the said first frequency 2. 4.The system of claim 21, where the phase-locked loop It consists of a controllable frequency generator. And a low-range filter for controlling the frequency generator, and such a low-range filter determines the implicit nature of the response. 5. System of claim 21 where the feedback signal is associated with a repeating pulse of line 2. 6. The system of claim 21, where such a section for generating the said time signal consists of a phase-locked loop. The second is in sync with the aforementioned horizontal sync elements and the frequency modulator is in sync with the phase-locked loop. Second number 2 7. The system of claim 21, where the sum of consecutive pulse periods of that time For each period, the pulses of the aforementioned sync elements are literally constant 2. 8. The system of claim 26 where the frequency modulator consists of a counter that can be preset. For dividing the frequency generator signal from the aforementioned second-order phase-locked loop