Anthony V Dinh

US Patent:

20090102546, Apr 23, 2009

Filed:

Mar 17, 2006

Appl. No.:

12/293285

Inventors:

Hiroshi Miyagi - Kanagawa, JP
Scott Tanner - Irvine CA, US
John Stockman - Corona Del Mar CA, US
Shiro Fujioko - Fountain Valley CA, US
Mark Ige - Huntington Beach CA, US
Jayson Caro - Diamond Bar CA, US
Anthony Dinh - San Jose CA, US

International Classification:

H04B 1/68

US Classification:

327557

Abstract:

A composite band-pass filter receives a quadrature input signal and passes an intermediate frequency signal while attenuating all other signals including an undesired image signal. The composite band-pass filter is comprised of a continuous time polyphase filter and a discrete time polyphase filter and can amplify signals. The amplification is distributed through out the composite band-pass filter and the amount of amplification may be selected by control signals. The composite band-pass filter has improved dynamic range and noise characteristics, selectable amplification and replaces an external crystal filter.