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. 28, 2014
Filed:
Aug. 05, 2011
Hajime Shibata, Toronto, CA;
Wenhua Yang, North Andover, MA (US);
David Alldred, Toronto, CA;
Analog Devices, Inc., Norwood, MA (US);
Abstract
A switch circuit can include an impedance selection switch and a multi-output-resistance switch driver. The impedance selection switch can electrically connect an impedance to an input of an amplifier in response to a driver output signal, and include at least one transistor. The multi-output-impedance switch driver may provide the driver output signal to the switch, and have a first, relatively higher output resistance when providing a first logic state of the driver output signal to turn on the switch, and a second, relatively lower output resistance when providing a second logic state of the driver output signal to turn off the switch. The ratio of the first output resistance to the second output resistance can be greater than a selected predetermined ratio value.