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公开(公告)号：US20140206296A1
公开(公告)日：2014-07-24
申请号：US13748008
申请日：2013-01-23
IPC分类号： H04B1/40
CPC分类号： H04B1/401 , H03F3/24 , H04B1/0458 , H04B1/18 , H04B2001/0408
摘要： A system on a chip (SoC) includes a transceiver comprising a transmitter and a receiver, wherein at least one of the transmitter and receiver has a configurable portion that can be configured to operate in a single ended mode and in a differential mode. Two interface pins are provided for coupling the transceiver to an antenna via a matching network, wherein the two interface pins are shareably coupled to the transmitter and to the receiver. A tunable capacitor is coupled to differential signal lines of the configurable portion, wherein the tunable capacitor is configured to be tuned to optimize impedance matching of the configurable portion for each mode of operation.
摘要翻译： 芯片上的系统（SoC）包括收发器，其包括发射器和接收器，其中发射器和接收器中的至少一个具有可配置部分，其可被配置为以单端模式和差分模式操作。 提供两个接口引脚用于通过匹配网络将收发器耦合到天线，其中两个接口引脚可共享地耦合到发射器和接收器。 可调电容器耦合到可配置部分的差分信号线，其中可调谐电容器被配置为调整以优化每个操作模式的可配置部分的阻抗匹配。
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公开(公告)号：US11979161B2
公开(公告)日：2024-05-07
申请号：US17828190
申请日：2022-05-31
发明人： Sudipto Chakraborty
IPC分类号： H03K5/131 , H04B7/0452 , H04B7/08 , H04J1/08 , H03K5/00
CPC分类号： H03K5/131 , H04B7/0452 , H04B7/084 , H04J1/08 , H03K2005/00286
摘要： In described examples, a quadrature phase shifter includes digitally programmable phase shifter networks for generating leading and lagging output signals in quadrature. The phase shifter networks include passive components for reactively inducing phase shifts, which need not consume active power. Output currents from the transistors coupled to the phase shifter networks are substantially in quadrature and can be made further accurate by adjusted by a weight function implemented using current steering elements. Example low-loss quadrature phase shifters described herein can be functionally integrated to provide low-power, low-noise up/down mixers, vector modulators and transceiver front-ends for millimeter wavelength (mmwave) communication systems.
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公开(公告)号：US20230318529A1
公开(公告)日：2023-10-05
申请号：US18326746
申请日：2023-05-31
发明人： Sudipto Chakraborty
IPC分类号： H03B5/12 , H03F3/45 , H03G3/30 , H03F1/02 , H03G3/00 , H03F3/213 , H03F3/24 , H03F3/21 , H03G1/00
CPC分类号： H03B5/1212 , H03B5/1228 , H03B5/1265 , H03F1/0211 , H03F1/0277 , H03F3/211 , H03F3/213 , H03F3/245 , H03F3/45 , H03G1/0005 , H03G3/004 , H03G3/3042 , H04B2001/0416
摘要： A variable-gain power amplifying technique includes generating, with a network of one or more reactive components included in an oscillator, a first oscillating signal, and outputting, via one or more taps included in the network of the reactive components, a second oscillating signal. The second oscillating signal has a magnitude that is proportional to and less than the first oscillating signal. The power amplifying technique further includes selecting one of the first and second oscillating signals to use for generating a power-amplified output signal, and amplifying the selected one of the first and second oscillating signals to generate the power-amplified output signal.
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公开(公告)号：US20220294436A1
公开(公告)日：2022-09-15
申请号：US17828190
申请日：2022-05-31
发明人： Sudipto Chakraborty
IPC分类号： H03K5/131 , H04J1/08 , H04B7/08 , H04B7/0452
摘要： In described examples, a quadrature phase shifter includes digitally programmable phase shifter networks for generating leading and lagging output signals in quadrature. The phase shifter networks include passive components for reactively inducing phase shifts, which need not consume active power. Output currents from the transistors coupled to the phase shifter networks are substantially in quadrature and can be made further accurate by adjusted by a weight function implemented using current steering elements. Example low-loss quadrature phase shifters described herein can be functionally integrated to provide low-power, low-noise up/down mixers, vector modulators and transceiver front-ends for millimeter wavelength (mmwave) communication systems.
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公开(公告)号：US11349465B2
公开(公告)日：2022-05-31
申请号：US16804236
申请日：2020-02-28
发明人： Sudipto Chakraborty
IPC分类号： H04B1/18 , H04B1/40 , H04B1/02 , H03M1/66 , H01Q3/00 , H04B1/26 , H03K5/131 , H04J1/08 , H04B7/08 , H04B7/0452 , H03K5/00
摘要： In described examples, a quadrature phase shifter includes digitally programmable phase shifter networks for generating leading and lagging output signals in quadrature. The phase shifter networks include passive components for reactively inducing phase shifts, which need not consume active power. Output currents from the transistors coupled to the phase shifter networks are substantially in quadrature and can be made further accurate by adjusted by a weight function implemented using current steering elements. Example low-loss quadrature phase shifters described herein can be functionally integrated to provide low-power, low-noise up/down mixers, vector modulators and transceiver front-ends for millimeter wavelength (mmwave) communication systems.
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公开(公告)号：US20220140787A1
公开(公告)日：2022-05-05
申请号：US17573662
申请日：2022-01-12
发明人： Sudipto Chakraborty
摘要： A variable-gain power amplifying technique includes generating, with a network of one or more reactive components included in an oscillator, a first oscillating signal, and outputting, via one or more taps included in the network of the reactive components, a second oscillating signal. The second oscillating signal has a magnitude that is proportional to and less than the first oscillating signal. The power amplifying technique further includes selecting one of the first and second oscillating signals to use for generating a power-amplified output signal, and amplifying the selected one of the first and second oscillating signals to generate the power-amplified output signal.
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公开(公告)号：US10374659B2
公开(公告)日：2019-08-06
申请号：US15140979
申请日：2016-04-28
IPC分类号： H04B5/00
摘要： A method, receiver and system for isolated wireless data transfer are disclosed. The receiver includes a switching mixer connected to receive a data signal and a local oscillator signal and to output a mixed differential signal, a programmable gain amplifier using an operational transconductance amplifier (OTA) and resistive feedback, the OTA connected to receive the mixed differential signal and to provide an amplified differential signal to a polyphase filter, and an analog demodulator to demodulate the output of the polyphase filter and provide digital output.
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公开(公告)号：US10116340B2
公开(公告)日：2018-10-30
申请号：US15008871
申请日：2016-01-28
发明人： Sudipto Chakraborty
摘要： A circuit and apparatus for filtering harmful harmonics is disclosed. The circuit and apparatus include a power amplifier core that uses equally sized inverter based amplifiers. The amplifier core cells provide uniform load to all phases of a fundamental frequency to cancel all harmonics at an output. The power amplifier stages are driven into nonlinearity, and the combination of harmonics is performed at the output by varying series connected capacitors. The harmonic combination is performed at the output, leaving no further scope of nonlinearity in the signal chain.
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公开(公告)号：US10070385B2
公开(公告)日：2018-09-04
申请号：US14986159
申请日：2015-12-31
摘要： A system of multiple concurrent receivers is described to process multiple narrow bandwidth wireless signals with arbitrary bandwidth and center frequency separation. These multiple receivers may provide a downconverted signal at the baseband frequency to process signal bandwidth using the lowest power consumption while using fully modular signal processing blocks operating at the low frequency. The concurrent receivers may operate from a single high frequency amplifier and may be derived from a low impedance point to reduce loading and improve scalability. The center frequency and bandwidth of each of the channels as well as phases of each of the channels may be independently reconfigured to achieve scalability, and on-chip test and calibration capability.
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公开(公告)号：US09893716B2
公开(公告)日：2018-02-13
申请号：US15293255
申请日：2016-10-13
CPC分类号： H03J3/02 , H03D7/165 , H03J1/0008 , H03J7/04 , H03J2200/10 , H03J2200/28 , H03J2200/29 , H03L7/0995 , H04B1/10 , H04B5/0031 , H04B5/0037 , H04B5/0093
摘要： Methods and circuitry for calibrating inductive-capacitive resonant circuits are disclosed. An example of the circuitry includes an inductive-capacitive (L-C) resonant circuit operable to receive signals in response to induced electromagnetic signals transmitted on a carrier frequency. A demodulator has a signal source and is operable to demodulate signals generated by the L-C resonant circuit. Switching circuitry is operable to inject signals generated by the signal source into the L-C resonant circuit during a calibration mode. The calibration mode is for adjusting the capacitance in the L-C resonant circuit to tune the L-C resonant circuit to the carrier frequency.
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