| 摘要 |
The keyboard-controlled tissue stimulator based on a microprocessor has pulse output circuits which emit output pulses at times and with amplitudes pre-determined by a microprocessor control arrangement. A microprocessor operates on the basis of user commands input via keys. The commands comprise a stop order which not only terminates the output pulses but also resets the amplitudes to a safe value, so that generation of unpleasantly high output signal levels is avoided on subsequent renewed starting. The OUT key producing the stop order is sited at a conspicuous point on the tissue stimulator housing, so that the user can stop operation very quickly in an emergency. Furthermore, keys for increasing and reducing the output amplitude are provided, and the microprocessor control arrangement responds to these commands in such a way that it changes the output amplitude continuously by pre-determined small increments for as long as the key is pressed. This permits the user to make gentle and accurate adjustments for optimum results. Another key orders the microprocessor control arrangement to switch over to another operation mode, for example pulse surge mode at a low rate. <IMAGE>
|
