Power supply arrangement for a tuning system
First Claim
1. In a receiver, apparatus comprising:
- tuning means for tuning said receiver to various channels;
power supply means for supplying at least one supply voltage to said tuning means;
tuning control means coupled to said tuning means for controlling said tuning means to change conditions of said tuning means associated with the selection of channels; and
power supply control means coupled to said power supply means and said tuning control means for normally causing the magnitude of said supply voltage to be at a relatively low level and for selectively causing the magnitude of said supply voltage to be at a level sufficiently higher than said low level to enable said channel selection conditions to be changed when said tuning control means is operated.
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Accused Products
Abstract
A tuning system of a television receiver includes a non-volatile memory for storing tuning information. Control apparatus allows memory locations of the memory to be selectively programmed during a set-up procedure for tuning respective channels and thereafter to be selectively interrogated during channel selection. A power supply for providing a supply voltage for the memory includes apparatus for maintaining the magnitude of the supply voltage at a relatively low level when the receiver is on but the tuning system is dormant, and for increasing the magnitude of the supply voltage to a change-enabling level for a predetermined time after the operation of switches for enabling the memory to be programmed during set-up and interrogated during channel selection.
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Citations
13 Claims
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1. In a receiver, apparatus comprising:
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tuning means for tuning said receiver to various channels; power supply means for supplying at least one supply voltage to said tuning means; tuning control means coupled to said tuning means for controlling said tuning means to change conditions of said tuning means associated with the selection of channels; and power supply control means coupled to said power supply means and said tuning control means for normally causing the magnitude of said supply voltage to be at a relatively low level and for selectively causing the magnitude of said supply voltage to be at a level sufficiently higher than said low level to enable said channel selection conditions to be changed when said tuning control means is operated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. In a television receiver including a picture tube for generating an electron beam;
- signal processing means for generating a video signal for modulating said electron beam;
horizontal and vertical deflection means for generating horizontal and vertical deflection signals to deflect said electron beam to form an image;
tuning register means for storing binary signals representing a selected channel;
channel selection means for changing the binary signals stored in said register means when operated;
converter means for converting said binary signals to a tuning voltage;
frequency selective means responsive to said tuning voltage for tuning said television receiver to various channels; and
channel number display means responsive to said deflection signals for displaying the channel number of said selected channel in a predetermined portion of said image for a display time after said selected channel is selected;
apparatus comprising;power supply means for generating at least one supply voltage for said tuning means in response to one of said deflection signals; and power supply control means connected to said power supply means and said channel selection means for normally causing the magnitude of said supply voltage to be at a relatively low value and selectively causing the magnitude of said supply voltage to be a relatively high value for a predetermined time longer than said display time after said channel change selection means is operated and thereafter automatically causing the magnitude of said supply voltage to return to said relatively low value. - View Dependent Claims (11, 12, 13)
- signal processing means for generating a video signal for modulating said electron beam;
Specification