Sensor signal circuit and measuring instrument
US7068026B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 2005 |
| Grant date | Jun 27, 2006 |
| Priority date | — |
| Expiry date | Apr 6, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/085
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A sensor signal circuit of the present invention includes a tacho generator (42) for detecting revolution speed of a motor and outing a detection result as a sensor signal converted to a voltage, and a controller (5) for driving and controlling the motor (41) based on the sensor signal from the tacho generator (42). The sensor signal circuit further includes a voltage to current converter (43) for outputting a current in proportion to the voltage output from the tacho generator (42) as a sensor signal current, a cable (6) connecting the voltage to current converter (43) and the controller (5), and a resistor (511) for converting the current to a voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.