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公开(公告)号：US20220231667A1
公开(公告)日：2022-07-21
申请号：US17463317
申请日：2021-08-31
发明人： Jaiganesh BALAKRISHNAN , Sriram MURALI , Kalyan GUDIPATI , Venkateshwara Reddy POTHAPU , Sarma Sundareswara GUNTURI
摘要： Dual mode filters having two reconfigurable multi-stage filters. In a dual band mode, each reconfigurable filter filters an input signal in a different band using every filter stage. In a single band mode, both reconfigurable filters are effectively divided into two sub-chains that include either the odd-numbered filter stages or the even-numbered filter stages. Together, the four sub-chains in the single band mode filter an input signal in a single band with a higher parallelization than each reconfigurable filter in the dual band mode. In some embodiments, the dual mode filter is a decimation filter. In other embodiments, the dual mode filter is a resampling filter. In still other embodiments, the dual mode filter is an interpolation filter.
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公开(公告)号：US20190273601A1
公开(公告)日：2019-09-05
申请号：US16417827
申请日：2019-05-21
发明人： Jaiganesh BALAKRISHNAN , Shagun DUSAD , Visvesvaraya PENTAKOTA , Srinivas Kumar Reddy NARU , Sarma Sundareswara GUNTURI , Nagalinga Swamy Basayya AREMALLAPUR
摘要： A clock divider comprises a clock delay line that comprises a plurality of delay elements, a clock delay selector coupled to the clock delay line and configured to select one of the plurality of delay elements and a bit pattern source coupled to the clock delay selector. The clock delay line is configured to generate a modulated divided clock signal with a suppressed fundamental spectral component.
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公开(公告)号：US20220271783A1
公开(公告)日：2022-08-25
申请号：US17489381
申请日：2021-09-29
发明人： Sarma Sundareswara GUNTURI , Venkateshwara Reddy POTHAPU , Chandrasekhar SRIRAM , Raju Kharataram CHAUDHARI , Sai Vaibhav BATCHU , Pankaj GAUR
摘要： A TX-TX pre-compensation system that estimates unwanted coupling in a victim transmit chain caused by an aggressor transmit chain and injects a pre-compensation signal to cancel out the estimated coupling. In some embodiments, a signal measurement module estimates the amplitude, phase, and envelope delay of the coupling and an isolation pre-compensation module generates the pre-compensation signal based on the estimated amplitude, the estimated phase, the estimated envelope delay, and the difference between the carrier frequencies of the transmit chains. Since the phase of the coupling may be affected by the carrier frequency of the transmit chains, in some embodiments the phase of the pre-compensation signal is adjusted in response to a change in carrier frequency. Since the amplitude of the coupling may be affected by attenuator gain settings, in some embodiments the amplitude of the pre-compensation signal may be adjusted in response to a change in attenuator gain setting.
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公开(公告)号：US20210100463A1
公开(公告)日：2021-04-08
申请号：US17123165
申请日：2020-12-16
摘要： An apparatus to detect a heart rate of a user includes a motion detection circuit configured to generate a motion status signal indicative of a motion status of the user. The apparatus also comprises a filter circuit coupled to the motion detection circuit that is configured to generate a filter circuit output signal based on dynamically variable. The coefficients are dependent on the motion status signal and a first signal received by the filter circuit. The apparatus also comprises a combination circuit coupled to the filter circuit and configured to receive a second signal indicative of the ambient light, the motion of the user, and non-ambient light reflected from the user. The combination circuit is configured to determine a difference between the second signal and the filter circuit output signal to generate a combination circuit output signal.
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公开(公告)号：US20200322067A1
公开(公告)日：2020-10-08
申请号：US16907051
申请日：2020-06-19
发明人： Sarma Sundareswara GUNTURI , Chandrasekhar SRIRAM , Jawaharlal TANGUDU , Sashidharan VENKATRAMAN
摘要： A channel response generating module and method for generating a channel response based on a ratio of a channel response corresponding to an image signal frequency bin in relation to a channel response corresponding to a traffic signal frequency bin, or a channel response corresponding to a first frequency bin in relation to a channel response corresponding to a second frequency bin, and a zero-IF signal transmitter employing the channel response generating module and method to efficiently suppress image signals or compensate traffic signals during transmission of IQ RF signals.
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6.发明申请公开(公告)号：US20160324477A1
公开(公告)日：2016-11-10
申请号：US15147720
申请日：2016-05-05
CPC分类号： A61B5/721 , A61B5/02416 , A61B5/725 , A61B5/7257 , A61B5/7278 , A61B2562/0219
摘要： The disclosure provides a heart rate monitor (HRM) circuit. The HRM circuit includes an analog front end (AFE). The AFE receives a Photoplethysmographic (PPG) signal, and generates a fine PPG signal. A motion cancellation circuit is coupled to the AFE, and receives the fine PPG signal and an accelerometer signal. The motion cancellation circuit subtracts the accelerometer signal from the fine PPG signal to generate a coarse heart rate. A peak detector is coupled to the motion cancellation circuit and the AFE, and generates an instantaneous heart rate. A filter is coupled to the peak detector, and generates an estimated heart rate from the instantaneous heart rate, the estimated heart rate is provided as a feedback to the peak detector.
摘要翻译： 本公开提供了心率监测器（HRM）电路。 HRM电路包括模拟前端（AFE）。 AFE接收到Photoplethysmographic（PPG）信号，并产生一个精细的PPG信号。 运动消除电路耦合到AFE，并且接收精细的PPG信号和加速度计信号。 运动消除电路从精细PPG信号中减去加速度计信号，以产生粗心率。 峰值检测器耦合到运动消除电路和AFE，并产生瞬时心率。 滤波器耦合到峰值检测器，并且从瞬时心率产生估计的心率，将估计的心率作为反馈提供给峰值检测器。
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公开(公告)号：US20230387975A1
公开(公告)日：2023-11-30
申请号：US17829218
申请日：2022-05-31
发明人： Sarma Sundareswara GUNTURI , Divyeshkumar Mahendrabhai PATEL , Sai Vaibhav BATCHU , Divyansh Deepak JAIN , Aswath VS
IPC分类号： H04B7/06
CPC分类号： H04B7/06
摘要： Examples of this description provide for a method. In some examples, the method includes determining, via a circuit, an estimated value of harmonic coupling in a transmitted signal via a feedback signal path that receives the transmitted signal and performing pre-compensation for the harmonic coupling based on the estimated value, the pre-compensation performed in the circuit.
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公开(公告)号：US20220182098A1
公开(公告)日：2022-06-09
申请号：US17544795
申请日：2021-12-07
发明人： Sundarrajan RANGACHARI , Nagalinga Swamy Basayya AREMALLAPUR , Kalyan GUDIPATI , Divyeshkumar Mahendrabhai PATEL , Venkateshwara Reddy POTHAPU , Aravind VIJAYAKUMAR , Sarma Sundareswara GUNTURI , Jaiganesh BALAKRISHNAN
摘要： A technique for reinitializing a coupled circuit, the technique including receiving a common configuration value associated with states of a coupled circuit, tracking states associated with the coupled circuit while the coupled circuit is in a low power state based on the common configuration value, receiving the tracked state associated with the coupled circuit, receiving a scaling value associated with the coupled circuit, determining a current state of the coupled circuit based on the tracked state and the scaling value, and transmitting an indication of the current state to the coupled circuit when the coupled circuit has exited the low power state.
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公开(公告)号：US20210226660A1
公开(公告)日：2021-07-22
申请号：US16983719
申请日：2020-08-03
摘要： A system includes: a host processor; a transceiver coupled to the host processor; and a power amplifier coupled to an output of the transceiver. The transceiver includes a transmit chain with digital pre-distortion (DPD) logic configured to: perform DPD correction operations on transmit data received by the transmit chain; and output corrected transmit data based on the performed DPD correction operations, wherein the output corrected transmit data is provided to the power amplifier.
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10.发明申请公开(公告)号：US20200169434A1
公开(公告)日：2020-05-28
申请号：US16684842
申请日：2019-11-15
发明人： Jawaharlal TANGUDU , Sashidharan VENKATRAMAN , Sarma Sundareswara GUNTURI , Chandrasekhar SRIRAM , Sthanunathan RAMAKRISHNAN , Ram Narayan KRISHNA NAMA MONY
摘要： A channel estimation method and system for IQ imbalance and local oscillator leakage correction, wherein an example of a channel estimation system comprising a calibrating signal generator configured to generate at least one pair of calibrating signals, a feedback IQ mismatch estimator configured to measure feedback IQ mismatch estimates based on the pair of calibrating signals, and a calibrating signal based channel estimator configured to generate a channel estimate based on the pair of calibrating signals and the feedback IQ mismatch estimates.
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