Patent · US Expired

Load sensor driver apparatus

US5391934A · kind A · utility

2Cited by
2References
28Claims
0Family size

Assignee

Inventor

Key dates

Filing dateJun 8, 1993
Grant dateFeb 21, 1995
Priority date
Expiry dateJun 8, 2013

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01G19/07
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A driver apparatus for driving one or more electrical loads includes an oscillator for providing an input signal. An amplifier amplifies the input signal. A power transformer has a primary winding for receiving the amplified input signal and at least one secondary winding for providing a drive signal to drive one or more electrical loads. The driver apparatus may include a center tap for the secondary windings or a precision resistive network for providing a pair of diametrically symmetrical drive signals at each secondary winding. A drive signal from one of the secondary windings is compared to a reference signal in an automatic gain control loop for application to the oscillator. An average drive signal could also be derived from one output from each secondary winding to be compared to the reference signal for forming the gain automatic control loop.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.