Electricity: measuring and testing – Electrical speed measuring – Including speed-related frequency generator
Patent
1994-02-22
1996-04-23
O'Shea, Sandra L.
Electricity: measuring and testing
Electrical speed measuring
Including speed-related frequency generator
327355, G01F 348, H03F 366
Patent
active
055107060
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.
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Ser. No. 08/168,298 Hansen et al. (Pending U.S. application) filing date Dec. 17, 1993.
David K. Long, "An Adaptive Sense Amplifier For Engine Control Applications", Paper No. 770435, Society of Automotive Engineers International Automotive Engineering Congress and Exposition, Cobo Hall, Detroit, Michigan Feb. 28-Mar. 4, 1977.
Delco Electronics Corporation
Funke Jimmy L.
O'Shea Sandra L.
Phillips Roger
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