The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 24, 1976
Filed:
Oct. 28, 1975
Alan Ryder, Church Crookham, near Aldershot, EN;
The Solartron Electronic Group Limited, Farnborough, EN;
Abstract
A bipolar reference voltage source comprises first and second ratio-matched transistors having respective collector load resistors and arranged to pass slightly different currents. The emitter of the first transistor is connected to two emitter resistors in series, while the emitter of the second is connected to the junction between the emitter resistors. The bases of the transistors are commoned, while their collectors are respectively connected to the two inputs of a differential amplifier. A switching arrangement has a first state in which the output of the differential amplifier is connected to the bases of the transistors, and the end of the two emitter resistors remote from the transistors is grounded, thereby producing a first reference voltage of one polarity at the output of the differential amplifier. The switching arrangement has a second state in which the output of the differential amplifier is connected to the end of the two emitter resistors remote from the transistors, the bases of the transistors are grounded and the polarity of the gain of the differential amplifier is reversed, thereby producing a second reference voltage, equal in magnitude but opposite in polarity to the first, at the output of the differential amplifier.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile