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. 11, 2000
Filed:
Sep. 05, 1997
Yoshio Nishida, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A current switching type switch circuit is constructed with a constant current source, a switch group consisted of a pair of P-type MOS transistors and a current mirror circuit consisted of first, second, third and fourth npn bipolar transistors. The sources of the P-type MOS transistors are connected in common and to a first power source via the constant current source. Complementary clock signals are input to the gates of the P-type MOS transistors. Collectors and bases of first and second npn bipolar transistors are respectively connected to drains of the P-type MOS transistors, and to bases of third and fourth npn bipolar transistors. Collectors of the third and fourth npn bipolar transistors are respectively connected to first and second load circuits. Also, emitters of all of npn bipolar transistors are connected to a second power source.