Differential to single-ended conversion circuit for a magnetic wheel speed sensor
US5510706A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 22, 1994 |
| Grant date | Apr 23, 1996 |
| Priority date | — |
| Expiry date | Feb 22, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P3/48
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A conversion circuit is provided for converting a differential voltage to a single-ended voltage. The conversion circuit has an input circuit including first and second input lines for receiving a differential voltage that is produced by a magnetic sensor in response to rotation of a wheel. First and second buffers are coupled to the first and second input lines, respectively, of the input circuit and each provide a buffered output. The conversion circuit further includes a difference amplifier having a positive input coupled to the output of the first buffer and a negative input coupled to the output of the second buffer. The amplifier provides as an output the voltage difference between the first and second inputs as a single-ended voltage output. The output circuit further converts the single-ended voltage output into a series of voltage pulses which provide rotational speed information about the wheel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.