| 摘要 |
In a tuning circuit for tuning a receiver to a desired broadcast frequency, which tuning circuit includes a source of counting pulses indicating the magnitude of the change in the frequency value to which the circuit is to be tuned, a counter connected to receive the counting pulses and to assume a count state representative of the broadcast frequency to which the circuit is to be tuned, and a timing member for producing a tuning signal having a value determinative of the frequency to which the circuit is tuned during a tuning operation, the timing member is provided with a unit connected to the source of counting pulses for deriving a control signal representative of the frequency of the pulses, and a unit connected for varying the tuning signal in accordance with the control signal in such a manner that as the frequency of the counting pulses increases, the rate of change of the frequency to which the circuit is tuned is increased. |
