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:
Jan. 09, 1990
Filed:
Sep. 07, 1988
Arnoldus J Boudewijns, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A signal voltage applied between the input terminals is converted by means of a differential amplifier into two phase-opposed signal currents which are inverted by means of a differential-to-single-ended converter into a single-ended signal current. The converter comprises a first and a second transistor with a common gate electrode and a third and a fourth transistor also with a common gate electrode, while the drain electrode of the third transistor is connected to the common date electrode of the first and the second transistor. The common gate electrode of the third and the fourth transistor is maintained at a voltage which is equal to the sum of one threshold voltage and two saturation voltages by means of a further transistor whose gate electrode is connected to the drain electrode and to a bias current source. The output of the amplifier can be driven by means of this converter up to two saturation voltages of the negative supply terminal.