Variable speed tuning selector

Details Variable speed tuning selector Variable speed tuning selector

1981-10-08

1983-10-04

Gensler, Paul L.

Tuners

Tuner unit directly responsive to voltage and/or current...

334 5, 3581911, 455169, 455170, H03J 114, H03J 122, H03J 302

Patent

active

044081723

ABSTRACT:
A touch sensitive variable speed tuning selector is disclosed. A rotary tuning selector knob includes a finger contact coupled to touch sensitive circuitry. Tuning selector rotation causes a shaft encoder to provide a first pulsed output to tuning circuitry for normal frequency change increments. When the touch sensitive circuitry detects the presence of a finger on the contact, a signal is provided to the tuning circuitry causing each pulse from the shaft encoder to change frequency in larger increments for fast, or coarse, tuning. In a preferred embodiment, a change in the capacitance of a touch sensitive capacitive network changes the timing of input pulses provided to a flip-flop which, in turn, changes the flip-flop output to the variable speed tuning circuitry resulting in an increase in frequency change increments.

REFERENCES:
patent: 3835384 (1974-09-01), Liff
patent: 4207479 (1980-06-01), Yamamoto et al.
patent: 4263581 (1981-04-01), Okatani et al.
patent: 4263618 (1981-04-01), Wine
patent: 4267601 (1981-05-01), Umeda et al.
patent: 4270117 (1981-05-01), Ziegelbein et al.
patent: 4281415 (1981-07-01), Rock, Jr.
patent: 4352010 (1980-02-01), Koogler

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