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:
Oct. 17, 1995
Filed:
Jan. 31, 1994
Marc H Ryat, Fort Collins, CO (US);
SGS-Thomson Microelectronics, Inc., Carrollton, TX (US);
Abstract
A wideband current multiplying divider circuit that produces an output current of any ratio to the input current has a first bipolar transistor and a first reference current source connected in series between a supply voltage and ground. A second bipolar transistor and a second reference current source are also connected in series between the supply voltage and around. A summation current source is connected at one side to ground and at the other side to a divided current path. A first resistor is connected in series with the station current source between a base of the first bipolar transistor and ground, and through which an input current can be connected to flow. A second resistor is connected in series with the summation current source between a base of the second bipolar transistor and ground, and through which an output current can be connected to flow. The ratio of the input to output currents is determined by the ratio of the first and second resistors, wherein the output current can be a multiplied or divided value of the input current. The first and second bipolar transistors are NPN transistors, and the first and second reference current sources source substantially equal reference currents. The circuit may further include a cascode circuit connected to substantially remove any Early effect error between the first and second bipolar transistors.