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US 4,303,944 AGranted
Television receiver compatible with both American and European systems
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorTsutomu Kitamura
Life of this patent
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Abstract
A television receiver compatible with both American and European systems in which, in the case of switching from the American system mode to the European system mode, the voltage at the center tap of a variable resistor, through which is supplied a tuning voltage, is caused to drop to a lower level so that the tuning voltages for the reception of European system high- and low-band VHF television channels can be obtained.
Claims3
A television receiver compatible with both American and European systems characterized by comprising
- (a) an electronic tuner,
- (b) a variable resistor for supplying a tuning voltage to said electronic tuner, the movable slider of said variable resistor being connected to a tuning voltage input terminal of said electronic tuner, said variable resistor having a center tap,
- (c) a switch for selecting a relatively wide low-band in the VHF range or a relatively narrow high-band in the VHF range, and
- (d) a means which, when said switch is closed for the reception of the low-band VHF television channels, is turned on and connects a resistor to said center tap of said variable resistor, thereby dropping the voltage at said center tap and which, when said switch is opened, is turned off and disconnects said resistor from said center tap of said variable resistor, in the case of the reception of the high-band VHF television channels, said means keeping said resistor disconnected from said center tap of said variable resistor regardless of said switch being opened or closed.
1 more element
Dependencies are inferred from the claim text.