专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US07224722B2 Direct conversion RF transceiver with automatic frequency control 有权
标题翻译：直接转换RF收发器具有自动频率控制
公开(公告)号：US07224722B2
公开(公告)日：2007-05-29
申请号：US10255378
申请日：2002-09-26
申请人： Zhongming Shi , Ahmadreza Rofougaran , Arya Reza Behzad
发明人： Zhongming Shi , Ahmadreza Rofougaran , Arya Reza Behzad
IPC分类号： H04B1/38 , H04L5/16
CPC分类号： H03G3/3042 , H03J7/04 , H04B1/04 , H04B1/30 , H04B1/408 , H04B2001/0416
摘要： A single chip radio transceiver includes circuitry that enables received wideband RF signals to be down-converted to baseband frequencies and baseband signals to be up-converted to wideband RF signals prior to transmission without requiring conversion to an intermediate frequency. The circuitry includes a low noise amplifier, automatic frequency control circuitry for aligning a local oscillation frequency with the frequency of the received RF signals, signal power measuring circuitry for measuring the signal to signal and power ratio and for adjusting frontal and rear amplification stages accordingly, and finally, filtering circuitry to filter high and low frequency interfering signals including DC offset.
摘要翻译：单芯片无线电收发器包括使接收的宽带RF信号下变频到基带频率的电路，并且基带信号在传输之前被上变频到宽带RF信号，而不需要转换到中频。该电路包括一个低噪声放大器，用于使本地振荡频率与接收到的RF信号的频率对准的自动频率控制电路，用于测量信号与信号和功率比的信号功率测量电路，以及相应地调整正面和后置放大级，最后，滤波电路来滤除高频和低频干扰信号，包括直流偏移。

2. 发明申请

US20100248670A1 DIRECT CONVERSION RF TRANSCEIVER FOR WIRELESS COMMUNICATION 有权
标题翻译：直接转换射频收发器进行无线通信
公开(公告)号：US20100248670A1
公开(公告)日：2010-09-30
申请号：US12795569
申请日：2010-06-07
申请人： Zhongming Shi , Ahmadreza (Reza) Rofougaran , Arya Reza Behzad
发明人： Zhongming Shi , Ahmadreza (Reza) Rofougaran , Arya Reza Behzad
IPC分类号： H04B1/06
CPC分类号： H03G3/3042 , H03J7/04 , H04B1/04 , H04B1/30 , H04B1/408 , H04B2001/0416
摘要： A single chip radio transceiver includes circuitry that enables received wideband RF signals to be down converted to base band frequencies and base band signals to be up converted to wideband RF signals prior to transmission without requiring conversion to an intermediate frequency. The circuitry includes a low noise amplifier, automatic frequency control circuitry for aligning the LO frequency with the frequency of the received RF signals, signal power measuring circuitry for measuring the signal to signal and power ratio and for adjusting frontal and rear amplification stages accordingly, and finally, filtering circuitry to filter high and low frequency interfering signals including DC offset.
摘要翻译：单芯片无线电收发机包括使接收的宽带RF信号下变频到基带频率和基带信号在传输之前被上转换成宽带RF信号的电路，而不需要转换到中频。该电路包括一个低噪声放大器，自动频率控制电路，用于将LO频率与接收到的RF信号的频率对准，信号功率测量电路，用于测量信号与信号和功率比，并相应地调整正面和后置放大级;以及最后，滤波电路对高频和低频干扰信号进行滤波，包括直流偏移。

3. 发明授权

US08571149B2 Direct conversion RF transceiver for wireless communication 有权
标题翻译：直接转换RF收发器用于无线通信
公开(公告)号：US08571149B2
公开(公告)日：2013-10-29
申请号：US12795569
申请日：2010-06-07
申请人： Zhongming Shi , Ahmadreza (Reza) Rofougaran , Arya Reza Behzad
发明人： Zhongming Shi , Ahmadreza (Reza) Rofougaran , Arya Reza Behzad
IPC分类号： H04L27/06
CPC分类号： H03G3/3042 , H03J7/04 , H04B1/04 , H04B1/30 , H04B1/408 , H04B2001/0416
摘要： A single chip radio transceiver includes circuitry that enables received wideband RF signals to be down converted to base band frequencies and base band signals to be up converted to wideband RF signals prior to transmission without requiring conversion to an intermediate frequency. The circuitry includes a low noise amplifier, automatic frequency control circuitry for aligning the LO frequency with the frequency of the received RF signals, signal power measuring circuitry for measuring the signal to signal and power ratio and for adjusting frontal and rear amplification stages accordingly, and finally, filtering circuitry to filter high and low frequency interfering signals including DC offset.
摘要翻译：单芯片无线电收发机包括使接收的宽带RF信号下变频到基带频率和基带信号在传输之前被上转换成宽带RF信号的电路，而不需要转换到中频。该电路包括一个低噪声放大器，自动频率控制电路，用于将LO频率与接收到的RF信号的频率对准，信号功率测量电路，用于测量信号与信号和功率比，并相应地调整正面和后置放大级;以及最后，滤波电路对高频和低频干扰信号进行滤波，包括直流偏移。

4. 发明授权

US07733981B2 Direct conversion RF transceiver for wireless communications 有权
标题翻译：直接转换RF收发器用于无线通信
公开(公告)号：US07733981B2
公开(公告)日：2010-06-08
申请号：US12168084
申请日：2008-07-04
申请人： Zhongming Shi , Ahmadreza (Reza) Rofougaran , Arya Reza Behzad
发明人： Zhongming Shi , Ahmadreza (Reza) Rofougaran , Arya Reza Behzad
IPC分类号： H03K9/00 , H04L27/06
CPC分类号： H03G3/3042 , H03J7/04 , H04B1/04 , H04B1/30 , H04B1/408 , H04B2001/0416
摘要： A single chip radio transceiver includes circuitry that enables received wideband RF signals to be down converted to base band frequencies and base band signals to be up converted to wideband RF signals prior to transmission without requiring conversion to an intermediate frequency. The circuitry includes a low noise amplifier, automatic frequency control circuitry for aligning the LO frequency with the frequency of the received RF signals, signal power measuring circuitry for measuring the signal to signal and power ratio and for adjusting frontal and rear amplification stages accordingly, and finally, filtering circuitry to filter high and low frequency interfering signals including DC offset.
摘要翻译：单芯片无线电收发机包括使接收的宽带RF信号下变频到基带频率和基带信号在传输之前被上转换成宽带RF信号的电路，而不需要转换到中频。该电路包括一个低噪声放大器，自动频率控制电路，用于将LO频率与接收到的RF信号的频率对准，信号功率测量电路，用于测量信号与信号和功率比，并相应地调整正面和后置放大级;以及最后，滤波电路对高频和低频干扰信号进行滤波，包括直流偏移。

5. 发明授权

US07397868B2 Direct conversion RF transceiver for wireless communications 有权
标题翻译：直接转换RF收发器用于无线通信
公开(公告)号：US07397868B2
公开(公告)日：2008-07-08
申请号：US11743143
申请日：2007-05-01
申请人： Zhongming Shi , Ahmadreza (Reza) Rofougaran , Arya Reza Behzad
发明人： Zhongming Shi , Ahmadreza (Reza) Rofougaran , Arya Reza Behzad
IPC分类号： H03K9/00 , H04L27/16
CPC分类号： H03G3/3042 , H03J7/04 , H04B1/04 , H04B1/30 , H04B1/408 , H04B2001/0416
摘要： A single chip radio transceiver includes circuitry that enables received wideband RF signals to be down converted to base band frequencies and base band signals to be up converted to wideband RF signals prior to transmission without requiring conversion to an intermediate frequency. The circuitry includes a low noise amplifier, automatic frequency control circuitry for aligning the LO frequency with the frequency of the received RF signals, signal power measuring circuitry for measuring the signal to signal and power ratio and for adjusting frontal and rear amplification stages accordingly, and finally, filtering circuitry to filter high and low frequency interfering signals including DC offset.
摘要翻译：单芯片无线电收发机包括使接收的宽带RF信号下变频到基带频率和基带信号在传输之前被上转换成宽带RF信号的电路，而不需要转换到中频。该电路包括一个低噪声放大器，自动频率控制电路，用于将LO频率与接收到的RF信号的频率对准，信号功率测量电路，用于测量信号与信号和功率比，并相应地调整正面和后置放大级;以及最后，滤波电路对高频和低频干扰信号进行滤波，包括直流偏移。

6. 发明授权

US07212586B2 Direct conversion RF transceiver for wireless communications 有权
标题翻译：直接转换RF收发器用于无线通信
公开(公告)号：US07212586B2
公开(公告)日：2007-05-01
申请号：US10052870
申请日：2002-01-18
申请人： Zhongming Shi , Reza Rofougaran , Arya Reza Behzad
发明人： Zhongming Shi , Reza Rofougaran , Arya Reza Behzad
IPC分类号： H03K9/00 , H04L27/16
CPC分类号： H03G3/3042 , H03J7/04 , H04B1/04 , H04B1/30 , H04B1/408 , H04B2001/0416
摘要： A single chip radio transceiver includes circuitry that enables received wideband RF signals to be down converted to base band frequencies and base band signals to be up converted to wideband RF signals prior to transmission without requiring conversion to an intermediate frequency. The circuitry includes a low noise amplifier, automatic frequency control circuitry for aligning the LO frequency with the frequency of the received RF signals, signal power measuring circuitry for measuring the signal to signal and power ratio and for adjusting frontal and rear amplification stages accordingly, and finally, filtering circuitry to filter high and low frequency interfering signals including DC offset.
摘要翻译：单芯片无线电收发机包括使接收的宽带RF信号下变频到基带频率和基带信号在传输之前被上转换成宽带RF信号的电路，而不需要转换到中频。该电路包括一个低噪声放大器，自动频率控制电路，用于将LO频率与接收到的RF信号的频率对准，信号功率测量电路，用于测量信号与信号和功率比，并相应地调整正面和后置放大级;以及最后，滤波电路对高频和低频干扰信号进行滤波，包括直流偏移。

7. 发明授权

US07158762B2 Direct conversion RF transceiver with automatic transmit power control 有权
标题翻译：直接转换RF收发器具有自动发射功率控制
公开(公告)号：US07158762B2
公开(公告)日：2007-01-02
申请号：US10340419
申请日：2003-01-10
申请人： Zhongming Shi , Ahmadreza Rofougaran , Arya Behzad
发明人： Zhongming Shi , Ahmadreza Rofougaran , Arya Behzad
IPC分类号： H04B1/40
CPC分类号： H04B1/408 , H03G3/3042 , H03J7/04 , H04B1/04 , H04B1/30 , H04B2001/0416
摘要： A single chip radio transceiver includes circuitry that enables received RF signals to be down-converted to baseband frequencies and baseband signals to be up-converted to RF signals prior to transmission without requiring conversion to an intermediate frequency. The circuitry includes a low noise amplifier, automatic frequency control circuitry for aligning the LO frequency with the frequency of the received RF signals, received signal strength indicators for adjusting frontal and rear amplification stages accordingly, and, finally, filtering circuitry to filter high and low frequency interfering signals, including DC offset. A radio frequency (RF) variable gain amplifier (VGA) includes a power amplifier in a direct conversion radio transceiver that includes a gain determination module that reduces an input gain level to the power amplifier to adjust the output power level of the power amplifier according to temperature indications to maintain reliable operation or power level indications to maintain a constant output power level.
摘要翻译：单芯片无线电收发机包括使得接收的RF信号能够被下变频到基带频率的电路，并且基带信号在传输之前被上转换为RF信号，而不需要转换到中频。该电路包括一个低噪声放大器，用于使LO频率与接收到的RF信号的频率对准的自动频率控制电路，用于相应地调节正面和后部放大级的接收信号强度指示器，以及最后滤波高低的滤波电路频率干扰信号，包括直流偏移。射频（RF）可变增益放大器（VGA）包括直接转换无线电收发器中的功率放大器，其包括增益确定模块，该增益确定模块将功率放大器的输入增益电平降低，以根据温度指示维持可靠的运行或功率电平指示，以保持恒定的输出功率水平。

8. 发明授权

US07020449B2 Fast settling variable gain amplifier with DC offset cancellation 有权
标题翻译：具有DC偏移消除的快速稳定可变增益放大器
公开(公告)号：US07020449B2
公开(公告)日：2006-03-28
申请号：US10274655
申请日：2002-10-21
申请人： Zhongming Shi
发明人： Zhongming Shi
IPC分类号： H04B1/12
CPC分类号： H03J7/04 , H03G3/3042 , H04B1/04 , H04B1/30 , H04B1/408 , H04B2001/0416
摘要： A variable gain amplifier includes circuit elements that may be partially powered down during transmit modes of operation and that may be powered back up whenever the radio transceiver receives a data packet within a specified settle time even for high throughput RF communications. The radio transceiver circuit may be powered down even in high throughput communications during a transmit mode to reduce power consumption. A DC offset cancellation block is operably coupled to the variable gain block to substantially remove any DC offset from the amplified output. The variable gain amplifier is further able to provide DC offset cancellation within the required settle time by holding the offset value during a dormant mode of operation. Further, the variable gain amplifier transitions from a first gain control value to a second gain control value and further modifies its internal settle time from a first value to a second value to enable the variable gain amplifier to reach a steady state within the required settle time whenever required. The settle time transitions from the second value back to the first value after a specified period of time.
摘要翻译：可变增益放大器包括在发射操作模式期间可以部分断电的电路元件，并且每当无线电收发器在指定的结算时间内接收数据分组时，即使对于高吞吐量的RF通信，也可以将其重新加电。即使在发射模式期间的高吞吐量通信中，无线电收发器电路也可能掉电以降低功耗。 DC偏移消除块可操作地耦合到可变增益块，以基本上去除放大输出的任何DC偏移。可变增益放大器还能够在所需的稳定时间内通过在休眠操作模式期间保持偏移值来提供DC偏移消除。此外，可变增益放大器从第一增益控制值转换到第二增益控制值，并且将其内部稳定时间从第一值进一步修改为第二值，以使可变增益放大器能够在所需的稳定时间内达到稳定状态每当需要时在规定的时间段之后，安息时间从第二个值转换回第一个值。

9. 发明授权

US06332083B1 Apparatus and associated method, for operating on receive signals received at a receiver 有权
标题翻译：用于对在接收机处接收的接收信号进行操作的设备和相关方法
公开(公告)号：US06332083B1
公开(公告)日：2001-12-18
申请号：US09281522
申请日：1999-03-30
申请人： Zhongming Shi , Ken Hsu
发明人： Zhongming Shi , Ken Hsu
IPC分类号： H04B138
CPC分类号： H04B1/30 , H03D7/16 , H04B1/406
摘要： Apparatus, and an associated method, for the IF stage of a receiver, such as the receive portion of a multi-mode mobile station. Direct conversion of an IF-stage receive signal is made into the digital domain through the use of a &Sgr;&Dgr; analog-to-digital converter. Increased portions of the receiver processes signals in the digital domain using digital-domain circuitry.
摘要翻译：用于接收机的IF级的装置和相关方法，诸如多模式移动台的接收部分。通过使用SIGMADELTA模数转换器将IF级接收信号的直接转换成数字域。接收机的增加部分使用数字域电路处理数字域中的信号。

10. 发明申请

US20070201565A1 DIRECT CONVERSION RF TRANSCEIVER FOR WIRELESS COMMUNICATIONS 有权
标题翻译：直接转换射频收发器用于无线通信
公开(公告)号：US20070201565A1
公开(公告)日：2007-08-30
申请号：US11743143
申请日：2007-05-01
申请人： Zhongming Shi , Ahmadreza (Reza) Rofougaran , Arya Behzad
发明人： Zhongming Shi , Ahmadreza (Reza) Rofougaran , Arya Behzad
IPC分类号： H04L27/00
CPC分类号： H03G3/3042 , H03J7/04 , H04B1/04 , H04B1/30 , H04B1/408 , H04B2001/0416
摘要： A single chip radio transceiver includes circuitry that enables received wideband RF signals to be down converted to base band frequencies and base band signals to be up converted to wideband RF signals prior to transmission without requiring conversion to an intermediate frequency. The circuitry includes a low noise amplifier, automatic frequency control circuitry for aligning the LO frequency with the frequency of the received RF signals, signal power measuring circuitry for measuring the signal to signal and power ratio and for adjusting frontal and rear amplification stages accordingly, and finally, filtering circuitry to filter high and low frequency interfering signals including DC offset.
摘要翻译：单芯片无线电收发机包括使接收的宽带RF信号下变频到基带频率和基带信号在传输之前被上转换成宽带RF信号的电路，而不需要转换到中频。该电路包括一个低噪声放大器，自动频率控制电路，用于将LO频率与接收到的RF信号的频率对准，信号功率测量电路，用于测量信号与信号和功率比，并相应地调整正面和后置放大级;以及最后，滤波电路对高频和低频干扰信号进行滤波，包括直流偏移。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式