公开(公告)号：US20030085829A1

公开(公告)日：2003-05-08

申请号：US10320016

申请日：2002-12-16

Applicant: Broadcom Corporation

Inventor： Klaas Bult ,  Chi-Hung Lin

IPC: H03M001/66

CPC classification number: H03M1/0624 ,  H03M1/0682 ,  H03M1/0872 ,  H03M1/685 ,  H03M1/747

Abstract: Binary indications are converted to an analog representation with significant reduction in ringing at the transitions between successive binary indications and in the period during each binary indication. The binary indications are disposed in a row-and-column matrix to provide a thermometer code. Each stage of the converter includes a decoder and latch arranged so the decoder inputs settle before the latch is set by the clock pulses. The stages are implemented in complementary CMOS. Complementary transistors are biased so one transistor of the pair is driven to the rail while the other transistor of the pair floats. A dummy CMOS transistor is used to balance the number of transistors in the decoder paths.

公开(公告)号：US20040227653A1

公开(公告)日：2004-11-18

申请号：US10810053

申请日：2004-03-26

Applicant: Broadcom Corporation

Inventor： Klaas Bult ,  Chi-Hung Lin

IPC: H03M001/66

CPC classification number: H03M1/0624 ,  H03M1/0682 ,  H03M1/0872 ,  H03M1/685 ,  H03M1/747

Abstract: Binary indications are converted to an analog representation with significant reduction in ringing at the transitions between successive binary indications and in the period during each binary indication. The binary indications are disposed in a row-and-column matrix to provide a thermometer code. Each stage of the converter includes a decoder and latch arranged so the decoder inputs settle before the latch is set by the clock pulses. The stages are implemented in complementary CMOS. Complementary transistors are biased so one transistor of the pair is driven to the rail while the other transistor of the pair floats. A dummy CMOS transistor is used to balance the number of transistors in the decoder paths.

公开(公告)号：US20040164770A1

公开(公告)日：2004-08-26

申请号：US10791878

申请日：2004-03-04

Applicant: Broadcom Corporation

Inventor： Jan Mulder ,  Marcel Lugthart ,  Chi-Hung Lin

IPC: H03D001/00

CPC classification number: H03H11/32

Abstract: Provided is a circuit to perform single-ended to differential conversion while providing common-mode voltage control. The circuit includes a converter to convert a single-ended signal to a differential signal and a stabilizing circuit adapted to receive the differential signal. The stabilizing circuit includes a sensor configured to sense a common-mode voltage level of the differential signal and a comparator having an output port coupled to the converter. The comparator is configured to compare the differential signal common-mode voltage level with a reference signal common-mode voltage level and produce an adjusting signal based upon the comparison. The adjusting signal is applied to the converter via the output port and is operative to adjust a subsequent common-mode voltage level of the differential signal.

公开(公告)号：US20030032394A1

公开(公告)日：2003-02-13

申请号：US09925312

申请日：2001-08-10

Applicant: Broadcom Corporation.

Inventor： Jan R. Westra ,  Rudy J. van de Plassche ,  Chi-Hung Lin

IPC: H04B001/44

CPC classification number: H04B1/583

Abstract: A transceiver front-end provides an interface between a transmission medium and transmitter, and between a transmission medium and receiver. The transceiver front-end includes a hybrid circuit, a high-pass filter, and a gain stage, that permits the reduction or the complete elimination of buffer amplifiers. Buffer amplifiers can be eliminated because the hybrid circuit and/or the high-pass filter are adapted so that they can be directly connected to each other, without a loss in circuit performance. Furthermore, the high-pass filter and/or the gain stage are also adapted so they can be directly connected. As such, the transceiver front-end can be constructed using all passive components, reducing or eliminating excess heat generation.

Abstract translation: 收发器前端提供传输介质和发射器之间以及传输介质和接收器之间的接口。 收发器前端包括混合电路，高通滤波器和增益级，允许减少或完全消除缓冲放大器。 可以消除缓冲放大器，因为混合电路和/或高通滤波器被适配成使得它们可以彼此直接连接，而不会损失电路性能。 此外，高通滤波器和/或增益级也适于直接连接。 因此，收发器前端可以使用所有无源组件构建，从而减少或消除多余的发热。