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. 28, 2009
Filed:
Sep. 30, 2006
Keith Bargroff, San Diego, CA (US);
Bert Fransis, San Diego, CA (US);
Keith Rampmeier, San Diego, CA (US);
Raducu Lazarescu, San Diego, CA (US);
Kostas Papathanasiou, Houston, TX (US);
Esa Tarvainen, San Diego, CA (US);
Tony Mellissonos, Carlsbad, CA (US);
Donghai Wang, San Diego, CA (US);
Keith Bargroff, San Diego, CA (US);
Bert Fransis, San Diego, CA (US);
Keith Rampmeier, San Diego, CA (US);
Raducu Lazarescu, San Diego, CA (US);
Kostas Papathanasiou, Houston, TX (US);
Esa Tarvainen, San Diego, CA (US);
Tony Mellissonos, Carlsbad, CA (US);
Donghai Wang, San Diego, CA (US);
RF Magic, Inc., San Diego, CA (US);
Abstract
An N×M crosspoint switch allows a signal from any one of the N inputs to be routed to one or more of the M crosspoint switch outputs. The switches within the crosspoint switch can be configured as voltage mode or current mode switches. In voltage mode switching an input to the crosspoint switch is provided to an input device, such as an amplifier, having a low output impedance. The output of the low impedance device is provided to a switch that connects the output of the low impedance device to a high input impedance device, such as a band translation device. In current mode switching, the low impedance output of the input device is connected to selectively activated high isolation transconductance devices having high input impedances. The outputs of the transconductance devices are connected to low impedance devices that operate as summing nodes.