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:
Apr. 17, 2001
Filed:
Apr. 21, 2000
Giovanni Stochino, Rome, IT;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
In a wide dynamic range and with constant transconductance (Gm) differential voltage-to-current converter, operating in class AB, essentially comprising two complementary pairs of transistors, respectively of pnp (Q,, Q,) and npn (Q,, Q,) type, and two nominally equal resistors (RE,and RE,), the emitters of the first pair transistors (Q,, Q,) are connected to the respective ones of dse second pair transistors (Q,, Q,) through the two resistores (E) having equal nominal resistance; a junction is provided between the emitters of the second pair transistors (Q,, Q,); and input voltages (V,and V,) are respectively applied to the bases of first pair transistors (Q,, Q,), from collectors of which transistor output currents (I,, I,) are taken. Preferably, in this differential voltage-to-current converter, biasing and thermal balancing circuits (VP,, VP,) are connected to the first (Q,, Q,) and, respectively, to the second (Q,, Q,) transistors of said two pairs of transistors.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile