| 摘要 |
In a remote control arrangement for a medical appliance, a transmitter and a receiver are provided. The transmitter has a frequency generator controllable by means of code words which generate frequency signals and a group frequency signal alternately. In order to improve the freedom from interference and ease of changing the frequency of the group frequency signal, the frequency generator is constructed to generate a plurality of additional group frequency signals as a function of the feeding one at a time of a corresponding number of different group code words. An impulse generator of the transmitter has two complementary outputs, and the inputs of the frequency generator are connected each through a diode to an output of the impulse generator so that in a prescribed switching state of the impulse generator the potentials corresponding to the binary values appearing at its outputs are connectable to the inputs of the frequency generator through all the diodes poled in the passage direction with reference to the respective potential corresponding to the respective bits of a prescribed group code word. |
