Variable rate tuning for radio transmitters and receivers

In a radio frequency device having a digitally controlled frequency determining circuit, and a manually rotatable dial means for generating pulses for incrementing and decrementing said frequency determining circuit,

• the improvement comprising,
• means responsive to the rate at which said dial generated output pulses are generated for producing an output signal the magnitude of which is a function of said rate, and
• means responsive to said output signal for generating additional pulses which are applied to said frequency determining circuit, the rate said additional pulses are generated being a function of the speed at which said dial is rotated.

In a radio frequency device including an operator manipulated dial and means associated therewith for producing electrical output pulses in response to the amount of dial rotation, and frequency determining means having an input responsive to said dial generated output pulses,

• the improvement comprising,
• means responsive to said dial generated output pulses for producing an analog voltage proportional to the rate at which said output pulses are generated, and
• voltage-to-frequency converter means responsive to the analog voltage for providing additional pulses to the input of said frequency determining means according to the speed at which said dial is rotated.