| 摘要 |
<p>PURPOSE:To attain simple and solid structure and also to realize excellent operability by arranging an operating switch on a steering wheel and allowing a coil form antenna provided around a longitudinal lever to be coupled electromagnetically to a switch group on the steering wheel and a load group driven through the operation. CONSTITUTION:In driving a car, a switch required from switch groups S1, S2... is applied. A sweep oscillator 1 sweeps periodically a range covering resonance frequencies f1, f2...fn of resonators P1, P2.... Since a resonator is loaded to a resonator side antenna through the application of the switch, an output current of the sweep oscillator 1 flows as a large resonance current when the resonance frequency of the applied resonator is coincident with the sweep frequency, and inputted to a synchronism detector 3 via an amplifier 2. The synchronism detector 3 generates a detected output pulse when there is a resonance frequency to an input signal at the resonance frequency in synchronizing with the sweep of the sweep oscillator and applies it to loads Li, Lj.</p> |
