TH62320A - Dynamic Focus Voltage Amplitude Regulator - Google Patents

Abstract

The DC60 (10/05/45) focused dynamic voltage generator incorporates a backfire (VFB) input signal source at the horizontal deflection frequency. A dual integrator (U9A, C33, C34) responds to the input signal to generate the parabolic periodic signal (VU9A). Amplitude detectors (D19, D20) respond to the parabolic periodic signal to generate a control signal (V56) indicating the amplitude of the parabolic periodic signal. A comparator circuit (U7A) responds to a reference level signal (between R50, R51) and responds to the control signal and is connected to the dual integrator to control the amplitude of the parabolic periodic signal in a negative feedback manner to control the gain. A nonlinear network (D18, R53) responds to the parabolic periodic signal to... A bathtub-shaped output signal (V5') is produced and connected to the focusing electrode of the cathode ray tube. A dynamic focusing voltage generator is incorporated with a backfire (VFB) input source at the horizontal deflection frequency. A dual integrator (U9A, C33, C34) responds to the input signal to generate the parabolic periodic signal (VU9A). An amplitude detector (D19, D20) responds to the parabolic periodic signal to generate a control signal (V56) indicating the amplitude of the parabolic periodic signal. A comparator circuit (U7A) responds to a reference level signal (between R50, R51) and responds to the control signal and is connected to the dual integrator to control the amplitude of the parabolic periodic signal in a negative feedback manner to control the gain. A nonlinear network (D18, R53) responds to the signal... A parabolic period is used to produce a bath-shaped output signal (V5'), which is connected to the focusing electrode of the cathode ray tube.

Claims (10)

1. The dynamically focused voltage amplitude control of the periodic signal device (VU9A) for periodic signals (VFB) at a frequency relative to the diffraction frequency (horizontal) consists of: - an input signal source (VFB) at a frequency relative to the diffraction frequency (horizontal); - a parabolic generator (U9A) that responds to the input signal to generate a parabolic periodic signal, which produces a field in the electron beam path of the tetrahedo ray tube that varies according to the parabolic periodic signal, which is characterized by an amplitude detector (D19, D20) that responds to the parabolic periodic signal to generate a control signal (56) indicating the amplitude of the parabolic periodic signal; and a comparator circuit (U7A) that responds to the signal (between R50, R51) at a reference level and responds to the control signal and is connected to the parabolic generator to control the amplitude of the parabolic periodic signal. A feature that uses negative feedback to control the gain. 2. A dynamically focused voltage amplitude controller of the image signal device under claim 1 is characterized by the input signal (VFB) being selected from different forward frequencies and by the amplitude of such parabolic periodic signal (VU9A) being controlled in a manner that negative feedback is applied to control the gain at each selected diffraction frequency. 3. The dynamically focused voltage amplitude regulator of the image signal device set according to claim 1, which is characterized as a parabolic generator (U9A), consists of a dual integrator. 4. A dynamic focus voltage amplitude regulator of the image signal device under claim 1, characterized by the parabolic periodic signal (VU9A), is connected to the focusing electrode of the cathode ray tube to obtain a dynamic focus voltage. 5. The dynamically focused voltage amplitude regulator of the image signal device according to claim 1, characterized as the amplitude detectors (D19, D20), consists of peak-to-peak detectors which generate a double voltage generator. 6. A dynamically focused voltage amplitude controller of the signal device set under claim 1, characterized in the following order as a nonlinear network (D18) that responds to the said parabolic periodic signal (VU9A) to produce a bath-shaped output signal (V5') to produce such a field in the said electron beam path. 7. The dynamically focused voltage amplitude control device of the signal set according to claim 1, which is characterized as a parabolic generator (U9A), consists of a rectangular voltage generator (U8A) which responds to the said control signal and is connected to an integrator (C33, CR65, C34) which generates the said periodic parabolic signal (VU9A). 8. A dynamically focused voltage amplitude controller of the image signal device according to claim 1, which is characterized by such an input signal (VFB) consisting of the backflip signal of the deflection circuit. 9. Dynamically Focused Voltage Amplitude Controller of the Image Signal Device for generating periodic signals at frequencies relative to the diffraction frequency, characterized by: - An input signal source (VFB) at a frequency relative to the diffraction frequency (horizontal); - A dual integrator (U9A, C33, C34) that responds to the input signal to generate the periodic output signal, producing a field in the cathode ray tube electron beam path that varies according to the periodic output signal; and - A comparator circuit (U7A) that responds to a signal (between R50, R51) at a certain reference level and to the periodic output signal, and is connected to the dual integrator to control the amplitude of the periodic output signal in a negative feedback manner to control the gain. 10. A dynamically focused voltage amplitude controller of the signal generation device for generating the aforementioned parabolic periodic signal (VU9A) at a frequency relative to the deflection frequency, characterized by: - an input signal source (VFB) at a frequency relative to the deflection frequency (horizontal); - a parabolic generator (U9A) that responds to the aforementioned input signal to generate the aforementioned parabolic periodic signal (VU9A); and - a nonlinear network (D18, R53) that responds to the aforementioned parabolic periodic signal to produce a bath-shaped output signal (V5') to produce such a field in the electron beam path of the cathode tube in a manner corresponding to the aforementioned bath-shaped output signal.