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:
Jun. 23, 1992
Filed:
Jul. 01, 1991
Carlos A Greaves, Austin, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A low voltage precision current generator includes an amplifier, a first transistor, a current portion, and an output portion. The amplifier has first and second input terminals and changes an output voltage until voltages at the first and second input terminals are equal. An input voltage which may be a stable reference voltage or a variable voltage is received at the first input terminal. The second input terminal is connected to the current portion in order to provide a reference current proportional to a voltage difference between the voltage at the second input terminal and a power supply voltage. The amplifier controls the conductivity of the first transistor in order to regulate the voltage at its second input terminal. A precision current precision current proportional to the reference current is then provided.