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:
Jul. 19, 2005
Filed:
Oct. 03, 2001
Applicants:
Carey Ritchey, Plano, TX (US);
Tom L. Davis, Carrollton, TX (US);
Inventors:
Carey Ritchey, Plano, TX (US);
Tom L. Davis, Carrollton, TX (US);
Assignee:
Microtune (Texas), L.P., Plano, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H007/25 ; H01P001/22 ;
U.S. Cl.
CPC ...
Abstract
Diode network configurations are disclosed in which cathode bias voltage is held substantially constant to provide an attenuator circuit in which return loss is optimized throughout a broad dynamic attenuation range. Preferred embodiments include PIN diodes arranged in a π network having two attenuation control signals provided thereto. Alternative embodiments include PIN diodes arranged in a T network having two attenuation control signals provided thereto.