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1. 发明授权

US06262603B1 RC calibration circuit with reduced power consumption and increased accuracy 有权
标题翻译： RC校准电路，功耗降低，准确度提高
公开(公告)号：US06262603B1
公开(公告)日：2001-07-17
申请号：US09515183
申请日：2000-02-29
申请人： Jitendra Mohan , Devnath Varadarajan , Vijaya Ceekala
发明人： Jitendra Mohan , Devnath Varadarajan , Vijaya Ceekala
IPC分类号： H03K522
CPC分类号： H03H7/0153 , H03B5/20 , H03H2210/043
摘要： An RC calibration circuit, which utilizes a resistor and a variable capacitor connected in parallel, reduces power consumption and increases the accuracy of the calibration by comparing the voltage on the resistor to the voltage on the capacitor after a predetermined time has expired since the capacitor began charging up. The result of the comparison, which indicates whether the voltage on the resistor is greater than the voltage on the capacitor, is then used to adjust the capacitance of the capacitor to servo the RC time constant to a predetermined value.
摘要翻译：使用电阻器和可变电容并联连接的RC校准电路通过将电阻器上的电压与电容器上的电压进行比较，降低功耗并提高校准精度，这是由于电容器开始充电比较结果表明，电阻器上的电压是否大于电容器上的电压，然后用于调整电容器的电容以使RC时间常数维持在预定值。

2. 发明授权

US06177789B1 Line driver for producing operating condition invariant signal levels 有权
标题翻译：线路驱动器，用于产生运行状态不变信号电平
公开(公告)号：US06177789B1
公开(公告)日：2001-01-23
申请号：US09495133
申请日：2000-01-31
申请人： Jitendra Mohan , Devnath Varadarajan , Vijaya Ceekala
发明人： Jitendra Mohan , Devnath Varadarajan , Vijaya Ceekala
IPC分类号： G05F316
CPC分类号： H04L25/028
摘要： A line driver outputs a pair of transmit signals TX+ and TX− that have substantially reduced output level variations due to variations in process, voltage, and temperature. The reduced output level variations are provided by varying the magnitude of the current that sets up the voltages of the transmit signals in a manner that offsets variations in the power supply voltage, temperature, and process, and by limiting variations of the bandgap current source to process and temperature only.
摘要翻译：线路驱动器输出一对发射信号TX +和TX-，其由于过程，电压和温度的变化而具有显着降低的输出电平变化。减小的输出电平变化通过改变设置发射信号的电压的电流的大小来提供，该电流以抵消电源电压，温度和过程的变化的方式，并且通过将带隙电流源的变化限制为过程和温度。

3. 发明授权

US06657489B1 Operational amplifier circuit with improved feedback factor 有权
标题翻译：运算放大器电路具有改进的反馈系数
公开(公告)号：US06657489B1
公开(公告)日：2003-12-02
申请号：US10029121
申请日：2001-12-21
申请人： Ramsin Ziazadeh , Jitendra Mohan , Abu-Hena M. Kamal , Devnath Varadarajan
发明人： Ramsin Ziazadeh , Jitendra Mohan , Abu-Hena M. Kamal , Devnath Varadarajan
IPC分类号： H03F345
CPC分类号： H03F1/56
摘要： An operational amplifier circuit with improved feedback factor is provided that includes an input impedance, an operational amplifier, and a current conveyor. The input impedance is operable to receive an input signal. The operational amplifier comprises an inverting input node, a non-inverting input node, and an output node. The operational amplifier is operable to generate an output signal at the output node based on the input signal. The current conveyor is coupled between the input impedance and the inverting input node of the operational amplifier. The current conveyor is operable to provide a low impedance to the input impedance and a high impedance to the operational amplifier.
摘要翻译：提供了具有改进的反馈因数的运算放大器电路，其包括输入阻抗，运算放大器和电流输送机。输入阻抗可操作以接收输入信号。运算放大器包括反相输入节点，非反相输入节点和输出节点。运算放大器可操作以基于输入信号在输出节点处产生输出信号。当前输送机耦合在运算放大器的输入阻抗和反相输入节点之间。当前的输送机可操作以向输入阻抗提供低阻抗，并向运算放大器提供高阻抗。

4. 发明授权

US06930537B1 Band-gap reference circuit with averaged current mirror offsets and method 有权
标题翻译：带平均电流镜偏移和方法的带隙参考电路
公开(公告)号：US06930537B1
公开(公告)日：2005-08-16
申请号：US10061939
申请日：2002-02-01
申请人： Vijaya G. Ceekala , James B. Wieser , Devnath Varadarajan , Laurence D. Lewicki , Jitendra Mohan
发明人： Vijaya G. Ceekala , James B. Wieser , Devnath Varadarajan , Laurence D. Lewicki , Jitendra Mohan
IPC分类号： G05F1/10 , G05F3/02 , G05F3/30
CPC分类号： G05F3/30
摘要： A band-gap reference circuit with averaged current mirror offsets is provided that includes a differential amplifier circuit, a low current transistor circuit, a high current transistor circuit, and a configuration circuit. The differential amplifier circuit includes a first input node operable to receive a first input signal, a second input node operable to receive a second input signal, and an output node operable to generate an output signal based on the input signal difference. The low current transistor circuit is coupled to the differential amplifier circuit and is operable to receive the output signal and to generate the first input signal based on the output signal. The high current transistor circuit is coupled to the differential amplifier circuit and is operable to receive the output signal and to generate the second input signal based on the output signal. The configuration circuit is coupled to the low current transistor circuit and to the high current transistor circuit. The configuration circuit is operable to configure the band-gap reference circuit for a plurality of states by switching a plurality of components between the low current transistor circuit and the high current transistor circuit at specified intervals.
摘要翻译：提供了具有平均电流镜偏移的带隙参考电路，其包括差分放大器电路，低电流晶体管电路，高电流晶体管电路和配置电路。差分放大器电路包括可操作以接收第一输入信号的第一输入节点，可操作以接收第二输入信号的第二输入节点和可用于基于输入信号差产生输出信号的输出节点。低电流晶体管电路耦合到差分放大器电路，并且可操作以接收输出信号并且基于输出信号产生第一输入信号。高电流晶体管电路耦合到差分放大器电路并且可操作以接收输出信号并且基于输出信号产生第二输入信号。配置电路耦合到低电流晶体管电路和高电流晶体管电路。配置电路可操作以通过以指定的间隔切换低电流晶体管电路和高电流晶体管电路之间的多个分量来配置多个状态的带隙基准电路。

5. 发明授权

US06606001B1 High-speed current-mirror circuitry and method of operating the same 有权
标题翻译：高速电流镜电路及其操作方法
公开(公告)号：US06606001B1
公开(公告)日：2003-08-12
申请号：US10000195
申请日：2001-10-25
申请人： Ramsin M. Ziazadeh , Jitendra Mohan , Devnath Varadarajan , Vjay Ceekala
发明人： Ramsin M. Ziazadeh , Jitendra Mohan , Devnath Varadarajan , Vjay Ceekala
IPC分类号： H03F304
CPC分类号： H03F3/345 , H03F2200/294 , H03F2200/372
摘要： There is disclosed high-speed current-mirror circuitry and methods of operating the same. An exemplary impedance-peaking current mirror comprises a N-channel drive transistor and a N-channel mirror transistor. The N-channel drive transistor has a source coupled to ground, a drain coupled to a current source and a gate coupled to the drain via a series connection of a resistor and an inductor. The N-channel mirror transistor has a source coupled to ground, a gate coupled to the drain of the N-channel drive transistor, and a drain coupled to a positive power supply via an impedance load.
摘要翻译：公开了高速电流镜电路及其操作方法。示例性的阻抗峰值电流镜包括N沟道驱动晶体管和N沟道镜像晶体管。 N沟道驱动晶体管具有耦合到地的源极，耦合到电流源的漏极和经由电阻器和电感器的串联连接到漏极的栅极。 N沟道反射镜晶体管具有耦合到地的源极，耦合到N沟道驱动晶体管的漏极的栅极和经由阻抗负载耦合到正电源的漏极。

6. 发明申请

US20110234318A1 LOW VOLTAGE DIFFERENTIAL SIGNAL DRIVER WITH REDUCED POWER CONSUMPTION 有权
标题翻译：具有降低功耗的低电压差分信号驱动器
公开(公告)号：US20110234318A1
公开(公告)日：2011-09-29
申请号：US13159672
申请日：2011-06-14
申请人： Khaldoon Abugharbieh , Jitendra Mohan , Ivan Dyzevik
发明人： Khaldoon Abugharbieh , Jitendra Mohan , Ivan Dyzevik
IPC分类号： H03F3/45
CPC分类号： H03F3/45475 , H03F3/45094
摘要： A low voltage differential signal (LVDS) driver circuit with reduced power consumption. A pre-driver stage, implemented as a differential current mode amplifier, is driven by the differential input signal and provides a corresponding differential drive signal, which drives the output stage, implemented as a differential voltage mode amplifier, which, in turn, provides the differential output signal for the load. Total current consumption equals the load current, which is provided by the output stage, plus a much smaller current used by the pre-driver stage.
摘要翻译：低电压差分信号（LVDS）驱动电路，功耗降低。实现为差分电流模式放大器的预驱动器级由差分输入信号驱动，并提供驱动输出级的相应的差分驱动信号，该差分驱动信号被实现为差分电压模式放大器，其反过来提供负载的差分输出信号。总电流消耗等于由输出级提供的负载电流，加上预驱动级使用的电流要小得多。

7. 发明授权

US07502568B1 Method of using low bandwidth sensor for measuring high frequency AC modulation amplitude 有权
标题翻译：使用低带宽传感器测量高频交流调制幅度的方法
公开(公告)号：US07502568B1
公开(公告)日：2009-03-10
申请号：US10728065
申请日：2003-12-04
申请人： Jitendra Mohan
发明人： Jitendra Mohan
IPC分类号： H04B10/00
CPC分类号： H04B10/0799 , H04B10/564
摘要： A slow monitor diode having a bandwidth only partially overlapping a lower end of a data transmission spectrum for a data transmission laser is employed to detect and control average output power of the data transmission laser and, from peak-to-peak measurements, optical modulation amplitude. The output current from the monitor diode reaches a peak value for long runs of consecutive logical 1's or 0's. Using peak detectors with a long decay rate, the peak-to-peak signal amplitude, directly representative of optical modulation amplitude, may be determined.
摘要翻译：采用具有与数据传输激光器的数据传输频谱的下端仅部分重叠的带宽的缓慢监视二极管来检测和控制数据传输激光器的平均输出功率，并且从峰到峰测量得到光调制幅度。来自监视二极管的输出电流达到连续逻辑1或0的长时间运行的峰值。使用长衰减速率的峰值检测器，可以确定直接代表光调制幅度的峰 - 峰信号幅度。

8. 发明授权

US07209006B1 Differential amplifier with increased common mode loop gain at low frequencies 有权
标题翻译：差分放大器在低频时增加共模环路增益
公开(公告)号：US07209006B1
公开(公告)日：2007-04-24
申请号：US11161506
申请日：2005-08-05
申请人： Jitendra Mohan
发明人： Jitendra Mohan
IPC分类号： H03F3/45
CPC分类号： H03F3/4565 , H03F2203/45082 , H03F2203/45631
摘要： A differential amplifier circuit with feedback to increase common mode loop gain at low frequencies.
摘要翻译：具有反馈的差分放大器电路，以在低频下增加共模环路增益。

9. 发明授权

US06724251B1 Apparatus and method for employing gain dependent biasing to reduce offset and noise in a current conveyor type amplifier 有权
标题翻译：用于采用增益相关偏置以减小当前输送机型放大器中的偏移和噪声的装置和方法
公开(公告)号：US06724251B1
公开(公告)日：2004-04-20
申请号：US10244150
申请日：2002-09-12
申请人： Ramsin M. Ziazadeh , Jitendra Mohan , Abu-Hena Mostafa Kamal
发明人： Ramsin M. Ziazadeh , Jitendra Mohan , Abu-Hena Mostafa Kamal
IPC分类号： H03F136
CPC分类号： H03F1/0266 , H03F1/34
摘要： A circuit with low noise and reduced offset that feeds an input of an opamp with a programmable feedback resistor that provides variable gain settings. Input biasing currents are varied using control bits that are also used to adjust the gain. When the input signal is small (gain at higher setting), a minimum bias current is provided to source the input voltage swing. This scheme reduces the noise and offset generated by the lower transconductance of a biasing transistor while maintaining a constant SNR and fixed offset even in the presence of relatively small input swings. Also, when the input signal is large (gain at lower setting), a maximum bias current can be provided to accommodate the relatively large input swing level. Although the overall noise and offset current are increased for large input swings, the overall SNR and offset is maintained for relatively lower input swings.
摘要翻译：具有低噪声和偏移偏移的电路，可将运算放大器的输入与可编程反馈电阻器进行输入，从而提供可变增益设置。使用也用于调整增益的控制位来改变输入偏置电流。当输入信号较小（较高设定时的增益）时，提供最小偏置电流来输入电压摆幅。该方案减少了由偏置晶体管的较低跨导产生的噪声和偏移，同时即使在存在相对较小的输入摆幅的情况下也能保持恒定的SNR和固定偏移。此外，当输入信号较大（在较低设置下的增益）时，可以提供最大偏置电流以适应较大的输入摆幅电平。尽管对于大的输入摆幅，整体噪声和偏移电流增加，但是对于相对较低的输入摆幅，整体SNR和偏移量保持不变。

10. 发明授权

US08638125B2 Low voltage differential signal driver with reduced power consumption 有权
标题翻译：低电压差分信号驱动器，降低功耗
公开(公告)号：US08638125B2
公开(公告)日：2014-01-28
申请号：US13159672
申请日：2011-06-14
申请人： Khaldoon Abugharbieh , Jitendra Mohan , Ivan Duzevik
发明人： Khaldoon Abugharbieh , Jitendra Mohan , Ivan Duzevik
IPC分类号： H03K5/22
CPC分类号： H03F3/45475 , H03F3/45094
摘要： A low voltage differential signal (LVDS) driver circuit with reduced power consumption. A pre-driver stage, implemented as a differential current mode amplifier, is driven by the differential input signal and provides a corresponding differential drive signal, which drives the output stage, implemented as a differential voltage mode amplifier, which, in turn, provides the differential output signal for the load. Total current consumption equals the load current, which is provided by the output stage, plus a much smaller current used by the pre-driver stage.
摘要翻译：低电压差分信号（LVDS）驱动电路，功耗降低。实现为差分电流模式放大器的预驱动器级由差分输入信号驱动，并提供驱动输出级的相应的差分驱动信号，该差分驱动信号被实现为差分电压模式放大器，其反过来提供负载的差分输出信号。总电流消耗等于由输出级提供的负载电流，加上预驱动级使用的电流要小得多。

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