| 摘要 |
There is described a device for adjusting analogue values in a circuit arrangement 16 which is controlled in analogue manner, a digital electronic system being connected in advance of the circuit arrangement 16, and the device being of such a nature that an operator can adjust, by way of a rotary actuating element 5, analogue values in an apparatus which contains the digital electronic system, for example a radio receiver, e.g. for volume or tone control purposes. Provided for this purpose is a pulse generator 1 which is operated by means of the rotary actuating element 5 and the pulses of which are, according to the direction of rotation of the rotary actuating element 5, counted into the forwards or the backwards input of a forwards/backwards counter 9. The counter state in digital form at output 10 is converted by a digital/analogue converter 11 into a corresponding analogue value at an output 14 which controls the analogue circuit arrangement 16 which in turn is operatively connected with indication or reproduction means 19. 16 may be e.g. a radio-receiver final stage and 19 may be e.g. a loudspeaker. 19 may be a lamp directly connected to output 14. In another embodiment a microprocessor is provided which, by writing in and subsequently reading out the pulses into and from a store, performs the function of the counter 9. <IMAGE> |
