JPS6284227U - - Google Patents

Description

[Brief explanation of the drawing]

FIGS. 1 to 3 are diagrams for explaining one embodiment of the present invention, and FIGS. 4 to 7 are diagrams for explaining the prior art. Figure 2 is a diagram showing the waveform of each part of Figure 1, Figure 3 is a diagram showing the waveform of the pulse width signal at the highest and lowest channel positions, and Figure 4 is a diagram showing the waveform of the pulse width signal at the highest and lowest channel positions. Fig. 5 is a diagram showing the channel position display state on the liquid crystal display panel, Fig. 6 is a diagram for explaining the pulse width signal, and Fig. 7 is a diagram of the conventional tuning voltage generation circuit. FIG. 3 is a diagram showing the configuration.

Claims (1)

[Scope of utility model registration request] A tuning device that includes an auto-tuning mechanism using a voltage synthesizer method and a display device that displays a channel position, the tuning device comprising: a first voltage generating circuit that generates a voltage corresponding to a first channel position; and a second channel position. When the pulse width signal having the duty corresponding to the channel position indicates the first channel position, the first voltage circuit is enabled, and the pulse width signal is activated. means for enabling the second voltage generating circuit when the width signal indicates a second channel position;
and means for creating a tuning voltage from the voltage generated by the second voltage generation circuit,
A tuning voltage adjustment circuit characterized in that a tuning voltage corresponding to a first channel position and a tuning voltage corresponding to a second channel position can be adjusted independently.