Title:
MULTI-BAND MIXER AND QUADRATURE SIGNAL GENERATOR FOR MULTI-MODE RADIO RECEIVER
Document Type and Number:
Japanese Patent JP2012165461
Kind Code:
A
Abstract:
To provide a receiver system for receiving signals at multiple frequency bands without the need of duplicating many hardware components.
The filtered signals output by a band pass filter 212a and a band pass filter 212b are supplied to a multi-input serial-parallel interface gm-stage 235 for selection of a desired operating frequency band of a wireless communication system. In response to an applied control signal from an SPI control part 250, the gm-stage 235 selects a band path (one of two outputs from BPFs 212) for output to a mixer core 240 and a mixer core 241. The mixers 240, 241 mix the received signals from the gm-stage 235 with quadrature signals output by a quadrature signal generator 245.
Inventors:
ALAM MOHAMMED S
KACZMAN DANIEL L
KACZMAN DANIEL L
Application Number:
JP2012106291A
Publication Date:
August 30, 2012
Filing Date:
May 07, 2012
Export Citation:
Assignee:
APPLE INC
International Classes:
H04B1/16; H03D7/14; H04B1/30
Domestic Patent References:
| JP2004320293A | 2004-11-11 | |||
| JP2002508132A | 2002-03-12 |
Foreign References:
| US6393279B1 | 2002-05-21 |
Attorney, Agent or Firm:
Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu
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