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公开(公告)号：US10551428B2
公开(公告)日：2020-02-04
申请号：US15685570
申请日：2017-08-24
发明人： Ajay Kumar , Hyunsoo Yeom
摘要： Embodiments of the present disclosure include a microcontroller with a frequency test circuit, a device-under-test (DUT) input, and a calculation engine circuit. The calculation engine circuit is configured to compare a measured frequency from the frequency test circuit measured from the DUT input to a reference frequency stored in memory, and, based on the comparison, adjust frequency of the DUT generating the DUT input.
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公开(公告)号：US10521045B2
公开(公告)日：2019-12-31
申请号：US15896494
申请日：2018-02-14
发明人： Ajay Kumar , Mikael Tual , Régis Vix
摘要： A touch controller may include a measurement circuit, configured to receive a signal from an active channel in a proximity sensor, and to sample and hold the signal to measure the signal. The touch controller may include a driven shield buffer. The touch controller may include a voltage reference circuit configured to generate a divided voltage reference, provide the divided voltage reference to the measurement circuit, and drive the divided voltage reference through a switched circuit to the driven shield buffer to hold channels in the proximity sensor during measurement of the active channel.
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公开(公告)号：US20190146017A1
公开(公告)日：2019-05-16
申请号：US16185037
申请日：2018-11-09
发明人： Ajay Kumar , James E. Bartling
摘要： An apparatus includes a capacitor, a reference voltage, an input signal to be measured, and a frequency calculation circuit. The frequency calculation circuit is configured to select a capacitance value for the capacitor, charge the capacitor with the reference voltage, discharge the capacitor to a threshold voltage, and, based on a comparison of time to discharge the capacitor to the threshold voltage with a clock cycle of the input signal, determine a frequency of the input signal.
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公开(公告)号：US20180006605A1
公开(公告)日：2018-01-04
申请号：US15634881
申请日：2017-06-27
发明人： Ajay Kumar , Hyunsoo Yeom , Qing Li
CPC分类号： H03B5/362 , H03B5/04 , H03B5/06 , H03B5/36 , H03B2200/0058 , H03B2200/0066 , H03B2200/0068 , H03B2200/0094 , H03G3/3036
摘要： A crystal oscillator is coupled to a digital automatic gain control (AGC) having oscillation detection and amplitude control loops. The oscillation detection loop may increase the transconductance (gm) of the oscillator transistor until oscillation is detected therefrom. Then the amplitude control loop detects the amplitudes of oscillations from the crystal oscillator, compares these amplitudes to high and low voltage references and generates digital signals to find a critical transconductance (gm) for an oscillator amplifier and control this gm to maintain a constant oscillation waveform amplitude therefrom. An up/down counter defines the servo control loop bandwidth/update-rate according to an update clock rate thereto. Loop stability is achieved when the control loop bandwidth is less than the start-up time required for the oscillation envelope of the crystal oscillator to grow for oscillation. An oscillator failure detector may also be provided.
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公开(公告)号：US20230236046A1
公开(公告)日：2023-07-27
申请号：US18095743
申请日：2023-01-11
发明人： Ajay Kumar
CPC分类号： G01D18/00 , G01B7/003 , G01D5/2053
摘要： An apparatus includes a sampling circuit to sample input from a sensor circuit. The input includes a cosine coil waveform and a sine coil waveform. The sampling circuit is to generate a cosine coil sampled data stream and a sine coil sampled data stream. The apparatus includes an adjustment circuit to, based upon a characterization of the sensor circuit, delay the cosine coil sampled data stream or the sine coil sampled data stream.
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公开(公告)号：US20220352912A1
公开(公告)日：2022-11-03
申请号：US17714586
申请日：2022-04-06
发明人： Ajay Kumar
摘要： A controller and a method is provided for controlling a capacitance of an LC circuit having a circuit frequency including, a variable capacitor to couple with an external inductor as part of an LC circuit, a target value, a spread spectrum function to generate an adjustment value, and a circuit to poll the target value, call the spread spectrum function, and set a capacitance of the variable capacitor based on the sum of the target value and the adjustment value.
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公开(公告)号：US20220321117A1
公开(公告)日：2022-10-06
申请号：US17498101
申请日：2021-10-11
发明人： Ajay Kumar
摘要： An apparatus is provided comprising a first t-switch, which includes an input port arranged to be connected to a first voltage source, a center-tap port, and an output port arranged to be connected to a load. The first t-switch is configured to connect the input port to the output port in an on mode and disconnect the input port from the output port in an off mode. The apparatus further comprises a bias voltage generation circuit configured to generate a bias voltage, the generated bias voltage coupled to the center-tap port of the first t-switch, the bias voltage determined based upon an output port voltage.
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公开(公告)号：US11145368B2
公开(公告)日：2021-10-12
申请号：US16919177
申请日：2020-07-02
发明人： Ajay Kumar
IPC分类号： G11C13/00
摘要： A memory device has a switch matrix with a power supply input, a control input and a power supply output, a random access memory with a power supply connection coupled with the power supply output of the switch matrix. The switch matrix has a capacitor being chargeable by a power supply and upon receiving a control signal through the control input, the switch matrix is designed to decouple the capacitor from the power supply and the random access memory and to couple the capacitor through the power supply output with the random access memory in reverse polarity thereby providing a negative power supply to the power supply output.
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公开(公告)号：US20210210140A1
公开(公告)日：2021-07-08
申请号：US16919177
申请日：2020-07-02
发明人： Ajay Kumar
IPC分类号： G11C13/00
摘要： A memory device has a switch matrix with a power supply input, a control input and a power supply output, a random access memory with a power supply connection coupled with the power supply output of the switch matrix. The switch matrix has a capacitor being chargeable by a power supply and upon receiving a control signal through the control input, the switch matrix is designed to decouple the capacitor from the power supply and the random access memory and to couple the capacitor through the power supply output with the random access memory in reverse polarity thereby providing a negative power supply to the power supply output.
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公开(公告)号：US20200303020A1
公开(公告)日：2020-09-24
申请号：US16893674
申请日：2020-06-05
发明人： Ajay Kumar , Yemi Omole
摘要： Embodiments of the present disclosure include an apparatus. The apparatus includes a flash memory with a device threshold voltage for an on/off state, a sense circuit, a decoupling capacitor, and a bleeder circuit. The sense circuit is configured to sense a voltage level of a voltage supply line. The bleeder circuit is configured to bleed a remaining charge available on the decoupling capacitor. The sense circuit is configured to determine a state of the flash memory based on the voltage level of the voltage supply line. The bleeder circuit is configured to bleed the decoupling capacitor in an off state and to preserve the remaining charge available in an on state.
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