| 摘要 |
An electronic channel selecting apparatus, comprising; a touch switch responsive to a touch of a finger thereto for selectively providing a plurality of individual channel selecting signals; a tuner including a voltage controlled variable capacitance diode; a plurality of tuning control voltage generators, each responsive to the corresponding one of said individual channel selecting signals for providing a different tuning control voltage to the said variable capacitance diode for selecting the corresponding one of a plurality of broadcasting channels, each of said tuning control voltage generators comprising a gate responsive to a gating signal for passing therethrough the corresponding individual channel selecting signal, a storing circuit responsive to the corresponding individual channel selecting signal, as gated by the said gate, for assuming an active state and responsive to a disabling signal for assuming an inactive state, a potentiometer for providing a predetermined voltage for selecting the corresponding one of said plurality of broadcasting channels when it is applied to the said variable capacitance diode, and a switch responsive to the active state output from the storing circuit for passing therethrough the said predetermined voltage as the said tuning control voltage to the said variable capacitance diode of the tuner; said apparatus further comprising a control responsive to the active state output from any one of said plurality of storing circuits and an individual channel selecting signal for providing said gating and disabling signals to said gates and storing circuits, respectively, whereby a state of receiving the corresponding one of said plurality of broadcasting channels is established.
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