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1. 发明授权

US06928127B2 Frequency synthesizer with prescaler 失效
标题翻译：带预分频器的频率合成器
公开(公告)号：US06928127B2
公开(公告)日：2005-08-09
申请号：US10387231
申请日：2003-03-11
申请人： Michael P. Mack , Srenik Mehta
发明人： Michael P. Mack , Srenik Mehta
IPC分类号： H03J1/00 , H03L7/197 , H04L7/00
CPC分类号： H03L7/1974 , H03J1/0041
摘要： A frequency synthesizer and a method for frequency synthesis are disclosed. The frequency synthesizer comprises a voltage controlled oscillator for generating an output signal having a synthesized frequency, and a prescaler connected to the VCO for receiving the output signal and providing a feedback signal. The prescaler programmatically selects between an integer divider value and a fractional divider value to divide the synthesized frequency of the output signal.
摘要翻译：公开了频率合成器和频率合成方法。频率合成器包括用于产生具有合成频率的输出信号的压控振荡器和连接到VCO的预分频器，用于接收输出信号并提供反馈信号。预分频器以编程方式选择整数分频值和分数分频值，以分频输出信号的合成频率。

2. 发明申请

US20130003626A1 OSCILLATOR SETTLING TIME ALLOWANCE 失效
标题翻译：振荡器稳定时间允许
公开(公告)号：US20130003626A1
公开(公告)日：2013-01-03
申请号：US13171275
申请日：2011-06-28
申请人： Paul J. Husted , Srenik Mehta
发明人： Paul J. Husted , Srenik Mehta
IPC分类号： H04W52/02
CPC分类号： G06F1/3234 , H03L3/00 , H04W52/0216 , H04W52/0293 , Y02D70/00 , Y02D70/122 , Y02D70/142 , Y02D70/144
摘要： Techniques are disclosed relating to oscillator settling time allowance. In one embodiment, an apparatus may include an oscillator and oscillation detection and control circuitry. The oscillation detection and control circuitry may be configured to awaken an oscillator at a predetermined time and detect an edge transition of oscillations. The oscillation detection and control circuitry may further be configured to measure the time from the power-on indication to edge transition detection. In one embodiment, the oscillation detection and control circuitry may be configured to store the measured time and use the measured time instead of the predetermined time for subsequent oscillator awakenings. In some embodiments, the apparatus may further include circuitry configured to compensate for an expected oscillator settling behavior.
摘要翻译：公开了关于振荡器稳定时间容限的技术。在一个实施例中，装置可以包括振荡器和振荡检测和控制电路。振荡检测和控制电路可以被配置为在预定时间唤醒振荡器并且检测振荡的边沿转变。振荡检测和控制电路还可被配置为测量从上电指示到边沿转换检测的时间。在一个实施例中，振荡检测和控制电路可以被配置为存储测量的时间，并且使用测量的时间而不是预定的时间用于随后的振荡器唤醒。在一些实施例中，该装置还可以包括被配置为补偿期望的振荡器稳定行为的电路。

3. 发明授权

US07051063B2 Integrated low power channel select filter having high dynamic range and bandwidth 有权
公开(公告)号：US07051063B2
公开(公告)日：2006-05-23
申请号：US10138848
申请日：2002-05-03
申请人： Brian Kaczynski , Srenik Mehta
发明人： Brian Kaczynski , Srenik Mehta
IPC分类号： G06G7/02
CPC分类号： H03H11/0472 , H03H11/0433 , H03H2011/0483 , H03H2210/012 , H03H2210/021 , H03H2210/025 , H03H2210/028 , H03H2210/036
摘要： A channel select filter circuit is disclosed using a current-mode transconductance-capacitor (gm-C) architecture, which is tuned by digitally controlled capacitor arrays. The main filter includes at least one transconductor-capacitor (gm-C) filter and a transresistance amplifier. A replica transconductor-capacitor (gm-C) filter and a phase detector are used to establish any phase shift in an input signal, and a state machine adjusts capacitor arrays in the the replica transconductor-capacitor (gm-C) filter and the at least one transconductor-capacitor (gm-C) filter in order to set a cut-off frequency of the channel select filter.

4. 发明授权

US08488506B2 Oscillator settling time allowance 失效
标题翻译：振荡器稳定时间容限
公开(公告)号：US08488506B2
公开(公告)日：2013-07-16
申请号：US13171275
申请日：2011-06-28
申请人： Paul J. Husted , Srenik Mehta
发明人： Paul J. Husted , Srenik Mehta
IPC分类号： G08C17/00
CPC分类号： G06F1/3234 , H03L3/00 , H04W52/0216 , H04W52/0293 , Y02D70/00 , Y02D70/122 , Y02D70/142 , Y02D70/144
摘要： Techniques are disclosed relating to oscillator settling time allowance. In one embodiment, an apparatus may include an oscillator and oscillation detection and control circuitry. The oscillation detection and control circuitry may be configured to awaken an oscillator at a predetermined time and detect an edge transition of oscillations. The oscillation detection and control circuitry may further be configured to measure the time from the power-on indication to edge transition detection. In one embodiment, the oscillation detection and control circuitry may be configured to store the measured time and use the measured time instead of the predetermined time for subsequent oscillator awakenings. In some embodiments, the apparatus may further include circuitry configured to compensate for an expected oscillator settling behavior.
摘要翻译：公开了关于振荡器稳定时间容限的技术。在一个实施例中，装置可以包括振荡器和振荡检测和控制电路。振荡检测和控制电路可以被配置为在预定时间唤醒振荡器并且检测振荡的边沿转变。振荡检测和控制电路还可被配置为测量从上电指示到边沿转换检测的时间。在一个实施例中，振荡检测和控制电路可以被配置为存储测量的时间，并且使用所测量的时间而不是预定的时间用于随后的振荡器唤醒。在一些实施例中，该装置还可以包括被配置为补偿期望的振荡器稳定行为的电路。

5. 发明授权

US08204451B1 Wireless transceiver using shared filters for receive, transmit and calibration modes 失效
标题翻译：无线收发器使用共享滤波器进行接收，发送和校准模式
公开(公告)号：US08204451B1
公开(公告)日：2012-06-19
申请号：US12182232
申请日：2008-07-30
申请人： Alireza Kheirkhahi , Hirad Samavati , Srenik Mehta , David Su , Brian Kaczynski
发明人： Alireza Kheirkhahi , Hirad Samavati , Srenik Mehta , David Su , Brian Kaczynski
IPC分类号： H04B1/40
CPC分类号： H03L7/099 , H03B5/1212 , H03B5/1228 , H03B5/1253 , H03B5/1265 , H03B2201/025 , H03J2200/10
摘要： A transceiver for use in a wireless device. The transceiver may include a receive portion for receiving an input RF signal. The receive portion may include at least one receive filter which may include a first filter. The transceiver may also include a transmit portion for transmitting an output RF signal. The transmit portion may include at least one transmit filter, which may include the first filter used in the receive portion. The transceiver may further include a plurality of switches, which may include a first switch coupled to an input of the first filter and a second switch coupled to an output of the first filter. The plurality of switches may be configurable to enable use of the first filter in the receive portion for receiving the input RF signal and use of the first filter in the transmit portion for transmitting the output RF signal.
摘要翻译：用于无线设备的收发器。收发器可以包括用于接收输入RF信号的接收部分。接收部分可以包括可以包括第一滤波器的至少一个接收滤波器。收发器还可以包括用于发送输出RF信号的发送部分。发射部分可以包括至少一个发射滤波器，其可以包括在接收部分中使用的第一滤波器。收发器还可以包括多个开关，其可以包括耦合到第一滤波器的输入的第一开关和耦合到第一滤波器的输出的第二开关。多个开关可以被配置为使得能够使用接收部分中的第一滤波器来接收输入RF信号，并且在发送部分中使用第一滤波器来发送输出RF信号。

6. 发明授权

US07132865B1 Mitigating parasitic current that leaks to the control voltage node of a phase-locked loop 有权
标题翻译：减轻泄漏到锁相环控制电压节点的寄生电流
公开(公告)号：US07132865B1
公开(公告)日：2006-11-07
申请号：US10898423
申请日：2004-07-23
申请人： Manolis Terrovitis , Srenik Mehta
发明人： Manolis Terrovitis , Srenik Mehta
IPC分类号： H03L7/06
CPC分类号： H03L7/0895 , H03L7/093
摘要： Parasitic current at the control voltage node of a phase-locked loop (PLL) can significantly reduce performance of the PLL. Off-state transistors in either the charge pump or the filter can cause this parasitic current. A method of canceling a parasitic current generated by the charge pump in the PLL is described. In this method, a leakage current associated with leaky circuits in the charge pump can be determined. An opposing current can be injected to the control voltage node. This opposing current is equal, but opposite, to the leakage current. A method of eliminating a parasitic current generated by the filter in the PLL is also described. In this method, for each programmable capacitor in an unused state, a unity gain buffer can charge the capacitor to the same potential as the control voltage node, thereby providing the same potential on both sides of the switch.
摘要翻译：锁相环（PLL）的控制电压节点处的寄生电流可以显着降低PLL的性能。电荷泵或滤波器中的截止状态晶体管都会导致该寄生电流。描述了消除由PLL中的电荷泵产生的寄生电流的方法。在该方法中，可以确定与电荷泵中的泄漏电路相关的泄漏电流。相反的电流可以被注入控制电压节点。该相对电流与漏电流相同但相反。还描述了消除由PLL中的滤波器产生的寄生电流的方法。在这种方法中，对于处于未使用状态的每个可编程电容器，单位增益缓冲器可以将电容器充电到与控制电压节点相同的电位，从而在开关的两侧提供相同的电位。

7. 发明授权

US06396356B1 Linearization scheme for voltage controlled oscillator 失效
标题翻译：压控振荡器的线性化方案
公开(公告)号：US06396356B1
公开(公告)日：2002-05-28
申请号：US09576839
申请日：2000-05-23
申请人： Srenik Mehta , Christopher Donald Nilson
发明人： Srenik Mehta , Christopher Donald Nilson
IPC分类号： H03B508
CPC分类号： H03L7/099 , H03B5/1243 , H03B5/1293 , H03B2201/0208 , H03C3/08 , H03L2207/06
摘要： A VCO system for equalizing a positive frequency deviation and a negative frequency deviation by using two varactors is described. The VCO system includes an active circuit and an oscillating circuit. The active circuit includes a first input, a second input coupled to ground and an output. The oscillating circuit is coupled to the output of the active circuit, including: a first varactor controlled by a first variable voltage; a second varactor controlled by a second variable voltage, connected in parallel to the first varactor; and an inductor connected in parallel to the first varactor and to the second varactor. An output signal of the oscillating circuit is fed back to the first input of the active circuit. The output signal of the oscillating circuit has a variable frequency in response to first and second variable voltages of the first and second varactors, respectively.
摘要翻译：描述了通过使用两个变容二极管来均衡正频偏和负频偏的VCO系统。 VCO系统包括有源电路和振荡电路。有源电路包括第一输入，耦合到地的第二输入和输出。振荡电路耦合到有源电路的输出，包括：由第一可变电压控制的第一变容二极管; 由与第一变容二极管并联连接的第二可变电压控制的第二变容二极管; 以及与第一变容二极管并联连接到第二变容二极管的电感器。振荡电路的输出信号反馈到有源电路的第一输入端。振荡电路的输出信号分别响应于第一和第二可变电抗器的第一和第二可变电压而具有可变频率。

8. 发明授权

US08155612B1 Wireless device using a shared gain stage for simultaneous reception of multiple protocols 失效
标题翻译：使用共享增益级的无线设备同时接收多个协议
公开(公告)号：US08155612B1
公开(公告)日：2012-04-10
申请号：US12323338
申请日：2008-11-25
申请人： Paul J. Husted , Srenik Mehta , Soner Ozgur
发明人： Paul J. Husted , Srenik Mehta , Soner Ozgur
IPC分类号： H04B1/06
CPC分类号： H04B1/406
摘要： A wireless device that can process signals according to multiple wireless protocols simultaneously and without signal loss. The wireless device may comprise an antenna and first and second wireless protocol circuitry. The first wireless protocol circuitry comprises a shared gain element that amplifies signals that are processed by each of the first and second wireless protocol circuitry. Since the third signals are amplified by the shared gain element prior to being split out to the respective protocol circuitry, the first and second portions of the amplified third signals do not have significant signal loss relative to the third signals provided by the antenna. Thus the wireless device can receive and process wireless signals according to both the first and second protocols simultaneously without any significant signal losses due to splitting of the receive signal.
摘要翻译：一种无线设备，可以同时处理多个无线协议信号，无信号丢失。无线设备可以包括天线和第一和第二无线协议电路。第一无线协议电路包括共享增益元件，其放大由第一和第二无线协议电路中的每一个处理的信号。由于第三信号在被分配到相应协议电路之前被共享增益元件放大，所以放大的第三信号的第一和第二部分相对于由天线提供的第三信号不具有显着的信号损耗。因此，无线设备可以同时接收和处理根据第一和第二协议的无线信号，而不会由于接收信号的分离而导致任何显着的信号损失。

9. 发明授权

US08106715B1 Low-power oscillator 有权
标题翻译：低功耗振荡器
公开(公告)号：US08106715B1
公开(公告)日：2012-01-31
申请号：US12630916
申请日：2009-12-04
申请人： Bita Nezamfar , Srenik Mehta
发明人： Bita Nezamfar , Srenik Mehta
IPC分类号： H03K3/03 , H03L1/02
CPC分类号： H03L1/02 , H03K3/011 , H03K3/02315 , H03K3/3545
摘要： In order to decrease the temperature sensitivity of an oscillator output, and obtain a frequency of oscillation that remains stable over variations in temperature, two oscillators may be configured with identical comparators and logic circuitry, but having different oscillation frequencies. The different oscillation frequencies may be achieved by configuring each oscillator with a respective resistor divider circuit configured to adjust the reference voltage at the reference input of the respective comparator. The difference between the respective periods of oscillation of the two oscillators may therefore become independent of the comparator delay, and may only depend on temperature sensitivity of the resistor. The output of one oscillator may be used to calibrate/adjust the output of the other oscillator based on the difference between the respective periods of oscillation of the two oscillators, due to the difference between the respective periods of oscillation of the two oscillators remaining substantially independent of variations in temperature.
摘要翻译：为了降低振荡器输出的温度灵敏度，并获得在温度变化上保持稳定的振荡频率，两个振荡器可以配置有相同的比较器和逻辑电路，但具有不同的振荡频率。可以通过配置每个振荡器来实现不同的振荡频率，相应的电阻分压器电路被配置为调整各个比较器的参考输入处的参考电压。因此，两个振荡器的各个振荡周期之间的差异可能变得与比较器延迟无关，并且可能仅取决于电阻器的温度灵敏度。一个振荡器的输出可以用于基于两个振荡器的各个振荡周期之间的差异来校准/调整另一个振荡器的输出，这是由于两个振荡器的各个振荡周期之间的差异基本上是独立的的温度变化。

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