公开(公告)号：US20020017953A1

公开(公告)日：2002-02-14

申请号：US09920842

申请日：2001-08-03

Applicant: Broadcom Corporation

Inventor： Frank W. Singor ,  Arya R. Behzad

IPC: H03G003/20

CPC classification number: H03F3/45183 ,  H03F3/45381 ,  H03F3/45475 ,  H03F2200/516 ,  H03F2203/45392 ,  H03F2203/45651 ,  H03F2203/45652 ,  H03F2203/45682 ,  H03F2203/45696 ,  H03F2203/45702

Abstract: A circuit and method for bridging an analog signal between two integrated circuits operating at different supply voltages. The circuit is a two stage fixed gain amplifier. The first stage is a transconductance amplifier and the second stage is an operational amplifier. The first stage converts an input signal from a voltage into a current. The second stage converts the current signal to an output voltage signal.

Abstract translation: 一种在不同电源电压下工作的两个集成电路之间桥接模拟信号的电路和方法。 该电路是两级固定增益放大器。 第一级是跨导放大器，第二级是运算放大器。 第一阶段将输入信号从电压转换为电流。 第二级将电流信号转换为输出电压信号。

公开(公告)号：US20030020544A1

公开(公告)日：2003-01-30

申请号：US10183552

申请日：2002-06-28

Applicant: Broadcom Corporation

Inventor： Arya R. Behzad

IPC: H03F003/45

CPC classification number: H03F1/3211 ,  H01F17/0006 ,  H01F17/0013 ,  H01F2017/0026 ,  H01F2017/0053 ,  H01F2021/125 ,  H01L23/5227 ,  H01L27/0248 ,  H01L27/08 ,  H01L2924/0002 ,  H01L2924/3011 ,  H03B5/364 ,  H03B2201/025 ,  H03B2201/0266 ,  H03D7/161 ,  H03D7/18 ,  H03G1/0029 ,  H03H11/1291 ,  H03J1/0075 ,  H03J3/04 ,  H03J3/08 ,  H03J3/185 ,  H03J2200/10 ,  H03L1/023 ,  H03L7/10 ,  H03L7/23 ,  H01L2924/00

Abstract: An integrated receiver with channel selection and image rejection is substantially implemented on a single CMOS integrated circuit. A receiver front end provides programable attenuation and a programable gain low noise amplifier. LC filters integrated onto the substrate in conjunction with image reject mixers provide image frequency rejection. Filter tuning and inductor Q compensation over temperature are performed on chip. Active filters utilize multi track spiral inductors with shields to increase circuit Q. Frequency planning provides additional image rejection. Local oscillator signal generation methods on chip reduce distortion. A PLL generates needed out of band LO signals. Direct synthesis generates in band LO signals. PLL VCOs are centered automatically. A differential crystal oscillator provides a frequency reference. Differential signal transmission throughout the receiver is used. ESD protection is provided by a pad ring and ESD clamping structure. Shunts utilize a gate boosting at each pin to discharge ESD build up. An IF VGA utilizes distortion cancellation achieved with cross coupled differential pair amplifiers having their Vds dynamically modified in conjunction with current steering of the differential pairs sources.

公开(公告)号：US20040135638A1

公开(公告)日：2004-07-15

申请号：US10745688

申请日：2003-12-29

Applicant: Broadcom Corporation

Inventor： Frank W. Singor ,  Arya R. Behzad

IPC: H03F003/68

CPC classification number: H03F3/45183 ,  H03F3/45381 ,  H03F3/45475 ,  H03F2200/516 ,  H03F2203/45392 ,  H03F2203/45651 ,  H03F2203/45652 ,  H03F2203/45682 ,  H03F2203/45696 ,  H03F2203/45702

Abstract: A circuit and method for bridging an analog signal between two integrated circuits operating at different supply voltages. The circuit is a two stage fixed gain amplifier. The first stage is a transconductance amplifier and the second stage is an operational amplifier. The first stage converts an input signal from a voltage into a current. The second stage converts the current signal to an output voltage signal.

公开(公告)号：US20040150467A1

公开(公告)日：2004-08-05

申请号：US10760492

申请日：2004-01-21

Applicant: Broadcom Corporation

Inventor： Arya R. Behzad

IPC: H03B001/00

CPC classification number: H03G5/10 ,  H03G1/0088 ,  H03G3/001 ,  H03G3/3036 ,  H03H11/245

Abstract: Often programmable gain attenuators (PGAs) are combined with high pass filters. Adjustment of the highpass filter however can have unintended effects, such as changing the step size of the PGA. By placing the resistance of the highpass filter in parallel with a programmable attenuator divider, the steps of the PGA can be minimally affected as the highpass frequency is adjusted.

Abstract translation: 通常可编程增益衰减器（PGA）与高通滤波器组合。 然而，高通滤波器的调整可能会产生意想不到的影响，例如改变PGA的步长。 通过将高通滤波器的电阻与可编程衰减器分压器并联，PGA的步骤可以在高通滤波器调整时受到最小的影响。