Key panel and memory control for electric scalpel - permits touch sensitive adjustment of mark-to-space ratio and amplitude of supply pulses under programmed control

摘要

The appts. has a generator (20) producing signals of different waveforms and a control panel with mechanisms for programming these waveforms and regulating the level of the output signal. The control panel has a smooth surface and has a touch sensitive keyboard of seven keys with an associated circuit (17) which constitutes the programming and regulating mechanisms and is connected to a microprocessor (18). The output signal amplitude for each waveform is displayed on luminous scales (1-4) on the control panel. The generator of output signals (20) is adjusted to allow programming of the parameters which define the output signal, in particular its cyclic ratio and its amplitude, starting from digital information stored in a memory (180) and having regard to orders furnished by the keyboard. Digital display units (15,16) indicate the voltage amplitude and the effective power furnished by the appts. respectively.