公开(公告)号：AU2003234450A1

公开(公告)日：2003-11-17

申请号：AU2003234450

申请日：2003-05-02

Applicant: ATHEROS COMM INC

Inventor： MEHTA SRENIK ,  KACZYNSKI BRIAN

IPC: H03H11/04

Abstract: A channel select filter circuit is disclosed using a current-mode transconductance-capacitor (gm-C) architecture, which is tuned by digitally controlled capacitor arrays. The main filter includes at least one transconductor-capacitor (gm-C) filter and a transresistance amplifier. A replica transconductor-capacitor (gm-C) filter and a phase detector are used to establish any phase shift in an input signal, and a state machine adjusts capacitor arrays in the the replica transconductor-capacitor (gm-C) filter and the at least one transconductor-capacitor (gm-C) filter in order to set a cut-off frequency of the channel select filter.

公开(公告)号：WO2004082196A3

公开(公告)日：2005-01-20

申请号：PCT/US2004007547

申请日：2004-03-11

Applicant: ATHEROS COMM INC

Inventor： MACK MICHAEL P ,  MEHTA SRENIK

IPC: H03J1/00 ,  H03L7/197 ,  H03D3/24

CPC classification number: H03L7/1974 ,  H03J1/0041

Abstract: A frequency synthesizer and a method for frequency synthesis are disclosed. The frequency synthesizer comprises a voltage controlled oscillator for generating an output signal having a synthesized frequency, and a prescaler connected to the VCO for receiving the output signal and providing a feedback signal. The prescaler programmatically selects between an integer divider value and a fractional divider value to divide the synthesized frequency of the output signal.

Abstract translation: 公开了频率合成器和频率合成方法。 频率合成器包括用于产生具有合成频率的输出信号的压控振荡器和连接到VCO的预分频器，用于接收输出信号并提供反馈信号。 预分频器以编程方式选择整数分频值和分数分频值，以分频输出信号的合成频率。