| 摘要 |
<p>RCA 73,145A In a tuning system for generating a tuning voltage for tuning a television receiver, channel identification apparatus includes a memory for storing binary signals representing boundary voltages having magnitudes corresponding to magnitudes of the tuning voltage between tuning voltage ranges for respective adjacent channels within a band. Because the tuning voltage characteristics associated with conventional television receivers include separated portions corresponding to respective frequency bands in which the television channels are located, boundary voltages corresponding to the boundaries of the tuning voltage ranges of the highest and lowest frequency channels in each band are also stored. As the memory locations are addressed, the boundary voltages are compared to the tuning voltages. Control apparatus causes the memory location associated with the next boundary voltage to be addressed and causes channel number apparatus to generate binary signals representing the next channel number when the magnitude of a predetermined one of the boundary voltage associated with an addressed one of the memory locations and the tuning voltage exceeds the magnitude of the other one. Display apparatus displays the channel number represented by the binary signals generated by the channel number means. Because the boundary voltages are utilized, the channel identification apparatus, as disclosed, is particularly well suited for use in a signal seeking system.</p> |
