-
公开(公告)号：US20210377084A1
公开(公告)日：2021-12-02
申请号：US17402108
申请日：2021-08-13
发明人： Yannick Guedon
摘要： A power transmitter includes: a first switch coupled between a first node and a reference voltage node; a second switch configured to be coupled between a power supply and the first node; a coil and a capacitor coupled in series between the first node and the reference voltage node; a first sample-and-hold (S&H) circuit having an input coupled to the first node; and a timing control circuit configured to generate a first control signal, a second control signal, and a third control signal that have a same frequency, where the first control signal is configured to turn ON and OFF the first switch alternately, the second control signal is configured to turn ON and OFF the second switch alternately, and where the third control signal determines a sampling time of the first S&H circuit and has a first pre-determined delay from a first edge of the first control signal.
-
12.发明申请公开(公告)号：US20210091655A1
公开(公告)日：2021-03-25
申请号：US17011439
申请日：2020-09-03
摘要： A high-side switching transistor of a rectifier circuit is driven by a high-side driver circuit to supply current to an output node. The high-side driver circuit is powered between a capacitive bootstrap node and the output node. A boot charge circuit charges the bootstrap capacitor by supplying current to the bootstrap node. The boot charge circuit includes: a first current path that selectively supplies a first charging current to the bootstrap node when the rectifier circuit is operating in a switching mode; and a second current path that selectively supplies a second charging current to the bootstrap node when the rectifier circuit is operating in a reset mode.
-
公开(公告)号：US20210091597A1
公开(公告)日：2021-03-25
申请号：US17004689
申请日：2020-08-27
摘要： A wireless power receiving circuit includes a transistor based rectifier receiving an AC input voltage, and control logic receiving an overvoltage signal. The control logic generates control signals for controlling turn on of transistors within the transistor based rectifier based upon the overvoltage signal so as to cause the transistor based rectifier to produce a rectified output voltage from the AC input voltage. A comparator compares the rectified output voltage to a reference voltage and asserts the overvoltage signal if the rectified output voltage is greater than the reference voltage. In response to assertion of the overvoltage signal, the control logic asserts the control signals to simultaneously turn on all transistors of the transistor based rectifier.
-
公开(公告)号：US20210088567A1
公开(公告)日：2021-03-25
申请号：US17016963
申请日：2020-09-10
摘要： A receiver circuit includes a rectifier operable in full-, half-synchronous and asynchronous modes. A measurement circuit, with method, provides for real-time power measurement within the rectifier. The measurements are made based on the average output current from the rectifier delivered to the load and measurements sampled over time of the instantaneous voltage at each input/output node of the rectifier. Equivalent resistance in the rectifier is determined from the measurements and power dissipation calculated from the determined equivalent resistance and the average output current. The instantaneous voltages are synchronously captured through high-voltage AC coupling in order to detect the voltage drop across each element of the rectifier. The sensed voltages are amplified in the low voltage domain and converted by a high-speed analog-to-digital converter in order to produce data useful in computing equivalent resistance values. From these values, power dissipation within the rectifier is calculated and real-time equivalent resistance is available.
-
公开(公告)号：US10775927B2
公开(公告)日：2020-09-15
申请号：US16055922
申请日：2018-08-06
发明人： Youngjin Wang , Tae-gil Kang
摘要： A data frame in a touch capacitive sensing circuit includes both mutual capacitance data and self capacitance data. The mutual capacitance data and self capacitance data of the frame are filtered to define mutual capacitance and self capacitance islands. Centroids of the mutual capacitance and self capacitance islands are calculated and then processed in a weighted mixing operation to produce a hybrid centroid that more accurately locates the coordinates of a detected touch/hover.
-
公开(公告)号：US10747384B1
公开(公告)日：2020-08-18
申请号：US16528824
申请日：2019-08-01
发明人： Tae-gil Kang , Aiden Jeon
IPC分类号： G06F3/044 , G06F3/0488
摘要： A capacitive touch matrix has first conductive row elements spaced apart from one another, and first row interconnection circuitry electrically connects the first conductive row elements. Second conductive row elements are spaced apart from one another, and second row interconnection circuitry electrically connects the second conductive row elements. First conductive column elements are positioned between two adjacent ones of the first conductive row elements, the first conductive column elements being spaced apart from one another. Second conductive column elements are positioned in a same column as the first conductive column elements and between the two adjacent ones of the first conductive row elements, the second conductive column elements being spaced apart from one another. First column interconnection circuitry electrically connects each first conductive column element, and second column interconnection circuitry electrically connects each conductive column element. The conductive elements and interconnection circuitries are coplanar with one another.
-
公开(公告)号：US10690721B2
公开(公告)日：2020-06-23
申请号：US16128645
申请日：2018-09-12
发明人： Beng-Heng Goh
摘要： A glitch detector includes an input flip-flop clocked by a clock signal and having a non-inverting data output, an inverting data output, and a data input receiving input from the inverting data output, the input flip-flop generating a divided version of the clock signal at the non-inverting data output. A configurable delay chain receives the divided version of the clock signal and generates a delayed version of the divided version of the clock signal as a delay output. An intermediate flip-flop clocked by the clock signal has a data input receiving the delay output, the intermediate flip-flop generating an intermediate output as a function of the delay output. A logic circuit receives the divided version of the clock signal and the intermediate output, and generates a glitch detect signal by performing a logical operation on the divided version of the clock signal and the intermediate output.
-
公开(公告)号：US20200133411A1
公开(公告)日：2020-04-30
申请号：US16173267
申请日：2018-10-29
发明人： Hugo Gicquel , Abhishek Singh
摘要： Disclosed herein is a touch screen controller including a driver circuit applying a drive signal to a drive line of a capacitive touch sensing panel. The driver circuit is powered by an accurate supply voltage. A driver supply circuit receives an input supply voltage and outputs the accurate supply voltage. The driver supply circuit includes a clocked comparator comparing a divided version of the accurate supply voltage to a reference voltage and outputting a comparison signal based thereupon. A voltage control circuit (e.g. a charge pump circuit) generates the accurate supply voltage in response to the comparison signal. The clocked comparator and voltage control circuit are both clocked by a driver supply circuit clock.
-
公开(公告)号：US10599257B2
公开(公告)日：2020-03-24
申请号：US16033730
申请日：2018-07-12
发明人： Aiden Jeon , Kai Lim
摘要： Disclosed herein is a touch screen controller including input circuitry operating a touch screen, and processing circuitry cooperating with the input circuitry to acquire mutual touch data and self touch data from the touch screen, sum values of the mutual touch data to produce mutual sums, normalize the mutual sums and the self touch data, and calculate differences between the normalized self touch data and the normalized mutual sums. The touch screen controller enters into a floating mode if a largest difference that is positive is greater than a positive difference threshold and if a smallest difference value that is negative is less than a negative difference threshold, but enters a non-floating mode if the largest difference that is positive is less than the positive difference threshold or if the smallest difference value that is negative is less than the negative difference threshold.
-
公开(公告)号：US20200042140A1
公开(公告)日：2020-02-06
申请号：US16653172
申请日：2019-10-15
发明人： Leonard Liviu DINU , Hugo GICQUEL
摘要： An electronic device includes a plurality of charge-to-current converters each including a first NMOS transistor having a source coupled to a sense line, a first capacitor between a gate and source of the first NMOS transistor so that a transient component of noise from the sense line is applied to both, a first PMOS transistor having a source coupled to the sense line, a second capacitor between a gate and source of the first PMOS transistor so the transient component of the noise is applied to both, a first current mirror having an input coupled to a drain of the first NMOS transistor and an output coupled to an output for that charge to current converter, and a second current mirror having an input coupled to a drain of the first PMOS transistor and an output coupled to the output for that charge to current converter.
-
-
-
-
-
-
-
-
-
搜索结果
422 条记录 (耗时 0.023 秒)
