| 摘要 |
PURPOSE:To display frequency and a level, by providing a change-over circuit for changing over a frequency display signal driving a 7-segment display part to from a level display signal. CONSTITUTION:A change-over circuit 5 changes over between the 7-segment drive signal for receiving frequency obtained by a PLL frequency control circuit 3 and the 7-segment drive signal for level display obtained by a level control circuit 4 to apply the same to a 7-segment drive circuit 2 which in turn inputs the signal for displaying frequency or signal for displaying a level supplied from the circuit 5 to drive a 7-segment display part 1. By this constitution the display part 1 can be used as the frequency display apparatus of a radio receiver using the circuit 5 as well as a level display apparatus.
|
