公开(公告)号：US09379604B2

公开(公告)日：2016-06-28

申请号：US13946340

申请日：2013-07-19

Applicant: RF Micro Devices, Inc.

Inventor： Jinhua Zhong ,  Daniel Charles Kerr ,  Kelvin Kai Tuan Yan ,  Brian Keith White

IPC: H04B1/44 ,  H02M3/07 ,  H02M1/00

CPC classification number: H02M3/07 ,  H02M2001/0032 ,  Y02B70/16

Abstract: Radio frequency (RF) switching circuitry includes support circuitry for maintaining one or more RF switching elements in either an ON or OFF state. The support circuitry includes a negative charge pump adapted to quickly generate a negative voltage during a “boost” mode of operation, and maintain the negative voltage during a normal mode of operation. The negative charge pump includes an oscillator adapted to generate a high frequency oscillating signal for driving the charge pump during the boost mode of operation and a low frequency oscillating signal for driving the charge pump during the normal mode of operation. By generating the high frequency oscillating signal only during a boost mode of operation, spurious noise coupled to the RF switch circuitry is minimized during a normal mode of operation.

Abstract translation: 射频（RF）切换电路包括用于将一个或多个RF开关元件维持在ON或OFF状态的支持电路。 支持电路包括负电荷泵，其适于在“升压”操作模式期间快速产生负电压，并且在正常工作模式期间保持负电压。 负电荷泵包括适于在升压操作期间产生用于驱动电荷泵的高频振荡信号的振荡器和用于在正常操作模式期间驱动电荷泵的低频振荡信号。 通过仅在升压操作模式期间产生高频振荡信号，耦合到RF开关电路的杂散噪声在正常操作模式期间被最小化。

公开(公告)号：US20140210436A1

公开(公告)日：2014-07-31

申请号：US13946340

申请日：2013-07-19

Applicant: RF Micro Devices, Inc.

Inventor： Jinhua Zhong ,  Daniel Charles Kerr ,  Kelvin Kai Tuan Yan ,  Brian Keith White

IPC: H02M3/158

CPC classification number: H02M3/07 ,  H02M2001/0032 ,  Y02B70/16

Abstract: Radio frequency (RF) switching circuitry includes support circuitry for maintaining one or more RF switching elements in either an ON or OFF state. The support circuitry includes a negative charge pump adapted to quickly generate a negative voltage during a “boost” mode of operation, and maintain the negative voltage during a normal mode of operation. The negative charge pump includes an oscillator adapted to generate a high frequency oscillating signal for driving the charge pump during the boost mode of operation and a low frequency oscillating signal for driving the charge pump during the normal mode of operation. By generating the high frequency oscillating signal only during a boost mode of operation, spurious noise coupled to the RF switch circuitry is minimized during a normal mode of operation.

Abstract translation: 射频（RF）切换电路包括用于将一个或多个RF开关元件维持在ON或OFF状态的支持电路。 支持电路包括负电荷泵，其适于在“升压”操作模式期间快速产生负电压，并且在正常工作模式期间保持负电压。 负电荷泵包括适于在升压操作期间产生用于驱动电荷泵的高频振荡信号的振荡器和用于在正常操作模式期间驱动电荷泵的低频振荡信号。 通过仅在升压操作模式期间产生高频振荡信号，耦合到RF开关电路的杂散噪声在正常操作模式期间被最小化。