公开(公告)号：US09972425B2

公开(公告)日：2018-05-15

申请号：US14946028

申请日：2015-11-19

Applicant: RF Micro Devices, Inc.

Inventor： Peter V. Wright ,  Kerry Burger

IPC: H03H11/04 ,  H01C7/00 ,  H04B1/04 ,  H03H7/46 ,  H03K17/0412 ,  H03K17/10 ,  H01C1/01 ,  H03H7/52

CPC classification number: H01C7/006 ,  H01C1/01 ,  H03H7/465 ,  H03H7/52 ,  H03K17/04123 ,  H03K17/102 ,  H04B1/0475

Abstract: A frequency-dependent resistor and circuitry employing the same are provided. In some embodiments, a resistor includes a substrate, an input port, an output port, and a conductive trace on the substrate between the input port and the output port. A resistance between the input port and the output port for a low frequency signal is at least five times lower than the resistance between the input port and the output port for an RF signal and the ratio of the frequencies of the RF signal to the low frequency signal is at least fifty. Circuitry including a transistor adapted to selectively couple the input to the output in response to a control signal provided via a resistor with resistance for a low frequency signal at least five times lower than resistance for an RF signal will have a reduced switching time while still isolating the RF signal.

公开(公告)号：US20170004909A1

公开(公告)日：2017-01-05

申请号：US14946028

申请日：2015-11-19

Applicant: RF Micro Devices, Inc.

Inventor： Peter V. Wright ,  Kerry Burger

IPC: H01C7/00 ,  H04B1/04 ,  H03K17/16 ,  H01C1/01 ,  H03H11/04 ,  H03K17/04

CPC classification number: H01C7/006 ,  H01C1/01 ,  H03H7/465 ,  H03H7/52 ,  H03K17/04123 ,  H03K17/102 ,  H04B1/0475

Abstract: A frequency-dependent resistor and circuitry employing the same are provided. In some embodiments, a resistor includes a substrate, an input port, an output port, and a conductive trace on the substrate between the input port and the output port. A resistance between the input port and the output port for a low frequency signal is at least five times lower than the resistance between the input port and the output port for an RF signal and the ratio of the frequencies of the RF signal to the low frequency signal is at least fifty. Circuitry including a transistor adapted to selectively couple the input to the output in response to a control signal provided via a resistor with resistance for a low frequency signal at least five times lower than resistance for an RF signal will have a reduced switching time while still isolating the RF signal.

Abstract translation: 提供了一种频率依赖电阻器和采用该电阻器的电路。 在一些实施例中，电阻器包括在输入端口和输出端口之间的衬底上的衬底，输入端口，输出端口和导电迹线。 低频信号的输入端口和输出端口之间的电阻至少比RF信号的输入端口和输出端口之间的电阻低5倍，而RF信号的频率与低频信号的频率之比 信号至少有五十个。 包括晶体管的电路，其适于响应于经由电阻器提供的控制信号选择性地将输入耦合到输出端，所述电阻器具有比RF信号的电阻低至少五倍的低频信号的电阻，同时仍然隔离 RF信号。