JPS62146362U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing an embodiment of this invention, Fig. 2 is a timing chart shown to explain the operation of the circuit in Fig. 1, and Figs. 3 and 4 are diagrams showing an example of use of this invention. , FIG. 5 is a diagram showing a conventional vertical pincushion distortion correction circuit, and FIGS. 6 and 7 are signal waveform diagrams shown to explain the operation of the circuit of FIG. 5, respectively. 22, 23... Pulse generation circuit, 24, 25...
...integrator circuit.

Claims (1)

[Claims for Utility Model Registration] A first integrating circuit generates a sawtooth wave of a certain period from pulses of a certain period for obtaining video synchronization of a television system, and further uses this sawtooth wave to generate a second wave. A parabolic wave generation circuit that obtains a parabolic wave from an integrating circuit, a first pulse generation circuit that obtains a first pulse whose waveform is shaped with the same period from the pulse of the constant period, and a first pulse that uses the first pulse. A second pulse having the same period and a different phase is generated using the first pulse.
a second pulse generation circuit that supplies the integrator circuit;
An active type parabolic wave generation circuit comprising: an adjusting means for controlling the phase of the parabolic wave by adjusting the phase of the first pulse of the first pulse generation circuit.