Document Type and Number:
Japanese Patent JPS5116081
Kind Code:
A
Abstract:
A tachometer circuit in accordance with the invention has two or more output states dependent upon the frequency of an applied signal. The tachometer circuit is of the type comprising at least one time-measurement circuit having two discharge paths for a capacitor which forms part of a time-constant network. One of the discharge paths is controlled by the applied signal and the other path is caused to conduct after a predetermined time. In the circuit of the present invention the discharge path to which the input signal is applied includes a thyristor or like element with a high holding current which ensures a non-controllable discharge of the capacitor, and the other discharge path comprises a unijunction transistor or like element with a low holding current.
Inventors:
KUROODO RONBAARU
Application Number:
JP4627375A
Publication Date:
February 09, 1976
Filing Date:
April 16, 1975
Export Citation:
Assignee:
RENAULT
PEUGEOT
PEUGEOT
International Classes:
G01R23/09; B60K31/04; B65G43/04; G01P1/10; G01P3/48; G01P3/489; G07B13/00; (IPC1-7): G07B13/00
Domestic Patent References:
| JPS4733559A |