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Primary Examiner: Kominski, John
Assistant Examiner: Karlsen, Ernest F.
Attorney: Hane, Baxley & Spiecens

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Title: Apparatus for measuring a signal voltage including a current source with a control input on which said signal appears

Abstract: The present invention relates to an apparatus for measuring the level of a signal voltage supplied to the control input of a controllable constant current source whose output is connected to a phase inverting circuit conducting in one direction and to a rectifier conducting in the opposite direction so that a full-wave rectified current is obtained which is adapted to flow through a measurement device in order to obtain a measure of the voltage level.

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Inventors: Lofmark, Bengt Gustav (Skarholmen, SW)

Application Number: 453563
Filing Date: 1974-03-22
Publication_date: 1976-02-10
Assignee: Telefonaktiebolaget L M Ericsson (Stockholm, SW)
Primary Class(es): 324/119 327/104
Other Classes:
US Patent Ref:

3411066	Nov, 1968	Bravenec	324/119.
3569841	Mar, 1971	Richman	324/119.
3621404	Nov, 1971	Sjogren	324/119.
3631342	Dec, 1971	McDonald	324/119.

Other Refs: Other References: Radio Mentor; heft 1; 1965; pp. 41-42.