With Capacitive Amplifying Device Patents (Class 330/7)
  • Patent number: 10043124
    Abstract: The present invention relates in one aspect to a voltage regulation circuit for an RFID circuit (10), the voltage regulation circuit comprising: an input (20) connectable to a rectifier circuit (14), an output (22) connectable to a processor (18) of the RFID circuit, at least one switch (24) arranged between the input (20) and the output (22) and connected to the input (20) and the output (22), wherein the switch (24) is capable to electrically connect the output (22) to the input (20) and to disconnect the output (22) from the input (20).
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: August 7, 2018
    Assignee: EM Microelectronic-Marin SA
    Inventor: Kevin Scott Buescher
  • Patent number: 9534973
    Abstract: A capacitive pressure sensor may be configured to transduce both a dynamic pressure and a static pressure using a single diaphragm. A capacitive pressure sensor may comprise a dynamic excitation signal module in parallel with a static excitation signal module, a summing amplifier module in connection with both the dynamic excitation module and the static excitation module, a dynamic charge amplifier stage in a parallel with a static charge amplifier stage, and a capacitive sensor connected to an output of the summing amplifier module, as well as an input of the dynamic charge amplifier stage, and an input of the static charge amplifier stage. Further, a dynamic excitation signal may be provided by the dynamic excitation signal module as a constant DC voltage signal, and a static excitation signal may be provided by the static excitation signal module as an AC voltage signal.
    Type: Grant
    Filed: April 1, 2014
    Date of Patent: January 3, 2017
    Assignee: ROSEMOUNT AEROSPACE, INC.
    Inventor: James Joseph McTighe
  • Patent number: 9395219
    Abstract: A computer-implemented method includes arranging two or more sensor nodes into a ring monitor. Each sensor node of the ring monitor is coupled to a sensor and cross-monitors at least one other sensor node in the ring monitor. A request is received to add a new sensor node. A spatial partitioning of a plane is generated, by a computer processor, representing locations of the new sensor node and the two or more sensor nodes in the ring monitor. The spatial partitioning includes a plurality of regions, each region corresponding to a sensor node. Two or more adjacent sensor nodes are selected from the two or more sensor nodes in the ring monitor, based at least in part on the spatial partitioning. The two or more adjacent sensor nodes are instructed to monitor the new sensor node, which is instructed to monitor each of the two or more adjacent sensor nodes.
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: July 19, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Eli M. Dow, Michael R. Kelly, Harry R. Kolar, Michael L. Passow
  • Patent number: 9006638
    Abstract: A capacitive transimpedance amplifier for a detector unit capable of generating first and second detection currents comprises: a read-out circuit including an integration capacitor coupled between an input node connected to the detector unit, and a common node between first and second transistors connected in series, and a sampling and holding unit coupled between the first common node and an output node for sampling and holding a voltage at the first common node; and a switch unit connected to control ends of the first and second transistors and the input node, and operable between a first state, where the first detection current is read out, and a second state, where the second detection current is read out.
    Type: Grant
    Filed: April 10, 2012
    Date of Patent: April 14, 2015
    Assignee: National Chi Nan University
    Inventors: Tai-Ping Sun, Yi-Chuan Lu, I-Tin Liu
  • Patent number: 8600442
    Abstract: A power recovery system includes a transmission line that is coupled to transfer an RF signal received via an antenna. The RF signal generates a partial standing wave in the transmission line and the transmission line has at least one standing wave anti-node. A power recovery circuit converts an anti-node signal from the at least one standing wave anti-node to a power signal.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: December 3, 2013
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Publication number: 20130241635
    Abstract: A capacitor amplifying circuit and an operating method thereof are disclosed. The capacitor amplifying circuit includes a first current source, a second current source, a current mirror unit, and an output capacitor. There is a proportion relationship between a first current of the first current source and a second current of the second current source. The current mirror unit is coupled between the first current source and the second current source. The current mirror unit includes N stages of current mirror circuit in series, wherein N is larger than or equal to 1. Each of the N stages of current mirror circuit has a proportional constant respectively. Two terminals of the output capacitor are coupled to the current mirror unit and a ground terminal respectively. The equivalent capacitance magnification of the output capacitor is related to the proportional constants based on the proportion relationship.
    Type: Application
    Filed: March 7, 2013
    Publication date: September 19, 2013
    Applicant: UPI SEMICONDUCTOR CORPORATION
    Inventor: Tsai-Yi Sung
  • Publication number: 20130106505
    Abstract: A capacitive transimpedance amplifier for a detector unit capable of generating first and second detection currents comprises: a read-out circuit including an integration capacitor coupled between an input node connected to the detector unit, and a common node between first and second transistors connected in series, and a sampling and holding unit coupled between the first common node and an output node for sampling and holding a voltage at the first common node; and a switch unit connected to control ends of the first and second transistors and the input node, and operable between a first state, where the first detection current is read out, and a second state, where the second detection current is read out.
    Type: Application
    Filed: April 10, 2012
    Publication date: May 2, 2013
    Inventors: Tai-Ping SUN, Yi-Chuan LU, I-Tin LIU
  • Patent number: 8350206
    Abstract: The invention relates to a transimpedance amplifier circuit for converting an input current into an output voltage Uout?, comprising an amplifier element (4) having at least one signal input and an output having the output voltage Uout. For this purpose, the transimpedance amplifier circuit has a T-shaped feedback network divided into at least a first branch (1), a second branch (2) and a third branch (3), which is connected in series with the first branch (1), thus producing a node (K). The first branch (1) has a non-reactive resistance (R1) and is connected to the output at one end and the node (K) at the other end. The second branch (2) has at least one capacitance C2 and is connected to the node (K) at one end and in particular to an earth at the other end, and the third branch (3) has at least one capacitance C3 and is connected to the node (K) at one end and to the signal input at the other end. As a result, a capacitive current division is effected at the node (K).
    Type: Grant
    Filed: August 14, 2008
    Date of Patent: January 8, 2013
    Assignee: Leica Geosystems AG
    Inventor: Reto Stutz
  • Publication number: 20120182067
    Abstract: A programmable-gain amplifier has a first input node coupled to receive a first input signal and a control input coupled to receive a gain select signal. The programmable-gain amplifier includes a differential amplifier having a first input and a first output and a plurality of capacitors. A first terminal of each of the plurality of capacitors is coupled to the first input of the differential amplifier, and a second terminal of each of the plurality of capacitors is coupled to the first input node during a sampling phase of the programmable-gain amplifier and selectively coupled to the first output of the differential amplifier, based on the gain select signal, during a gain phase of the programmable-gain amplifier.
    Type: Application
    Filed: January 18, 2011
    Publication date: July 19, 2012
    Inventors: Ammisetti V. Prasad, James R. Feddeler
  • Patent number: 8120386
    Abstract: A circuit comprises a control line and a two terminal semiconductor device having first and second terminals. The first terminal is coupled to a signal line, and the second terminal is coupled to the control line. The two terminal semiconductor device is adapted to have a capacitance when a voltage on the first terminal relative to the second terminal is above a threshold voltage and to have a smaller capacitance when a voltage on the first terminal relative to the second terminal is below the threshold voltage. The control line is coupled to a control signal and the signal line is coupled to a signal and is output of the circuit. A signal is placed on the signal line and voltage on the control line is modified (e.g., raised in the case of n-type devices, or lowered for a p-type devices). When the signal falls below the threshold voltage, the two terminal semiconductor device acts as a very small capacitor and the output of the circuit will be a small value.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: February 21, 2012
    Assignee: International Business Machines Corporation
    Inventors: Wing K. Luk, Robert H. Dennard
  • Publication number: 20110291753
    Abstract: Various apparatuses and methods for amplifying an FM signal in a segmented linear power amplifier are disclosed herein. For example, some embodiments provide an apparatus including a signal input, a signal output, and an output driver connected between the signal input and the signal output. The output driver includes a number of driver segments connected in parallel, each having an input connected to the signal input and each having an output. The output driver also includes a number of series capacitors, each associated with one of the driver segments. The series capacitors are each connected between the output of its associated driver segment and the signal output. The output driver also includes a number of shunt capacitors, each associated with one of the driver segments having an associated series capacitor. The shunt capacitors are each connected between the output of their associated driver segment and a ground.
    Type: Application
    Filed: May 27, 2010
    Publication date: December 1, 2011
    Inventors: Brian P. Ginsburg, Mehmet Ozgun
  • Publication number: 20110215864
    Abstract: Provided is a switched capacitor amplifier capable of outputting a stable output voltage. The switched capacitor amplifier is capable of operating so as to eliminate a charge/discharge time difference between an input capacitor (18) and an output capacitor (19). Accordingly, in a shift from a hold state to a sample state, for example, even if one terminal voltage (V2) of the output capacitor (19) abruptly increases to an output voltage (VOUT), another terminal voltage (Vs) of the output capacitor (19) does not increase abruptly. In other words, an input voltage to an internal amplifier (11) does not increase abruptly. Therefore, an output voltage of the internal amplifier (11) becomes stable and accordingly the output voltage (VOUT) becomes stable as well.
    Type: Application
    Filed: March 3, 2011
    Publication date: September 8, 2011
    Inventor: Toshiyuki Uchida
  • Publication number: 20110068860
    Abstract: The detection circuit comprises a photodiode connected to an input of a capacitive transimpedance amplifier. The circuit comprises an anti-blooming circuit connected between the input and an output of the capacitive trans-impedance amplifier. The anti-blooming circuit comprises a field effect transistor connected between the input and output of the capacitive trans-impedance amplifier. The transistor is of pMOS type when the input of the capacitive transimpedance amplifier is connected to a cathode of the photodiode. The transistor is of nMOS type when the input of the capacitive transimpedance amplifier is connected to an anode of the photodiode.
    Type: Application
    Filed: September 22, 2010
    Publication date: March 24, 2011
    Applicant: SOCIETE FRANCAISE DE DETECTEURS INFRAROUGES - SOFRADIR
    Inventor: Laurent BAUD
  • Publication number: 20090302936
    Abstract: A circuit comprises a control line and a two terminal semiconductor device having first and second terminals. The first terminal is coupled to a signal line, and the second terminal is coupled to the control line. The two terminal semiconductor device is adapted to have a capacitance when a voltage on the first terminal relative to the second terminal is above a threshold voltage and to have a smaller capacitance when a voltage on the first terminal relative to the second terminal is below the threshold voltage. The control line is coupled to a control signal and the signal line is coupled to a signal and is output of the circuit. A signal is placed on the signal line and voltage on the control line is modified (e.g., raised in the case of n-type devices, or lowered for a p-type devices). When the signal falls below the threshold voltage, the two terminal semiconductor device acts as a very small capacitor and the output of the circuit will be a small value.
    Type: Application
    Filed: August 18, 2009
    Publication date: December 10, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Wing K. Luk, Robert H. Dennard
  • Publication number: 20090140900
    Abstract: Disclosed are a sensor interface device and an amplifier used in a sensor system. The sensor interface device in one implementation has a first chopper configured to shift input signals of the sensor system from a baseband frequency to a first frequency, an instrumentation amplifier configured to amplify the shifted signals, a bandpass Delta-Sigma modulator configured to digitize the amplified signals, and a second chopper configured to shift the digitized signals from the a first frequency back to the baseband frequency. The instrumentation amplifier removes the DC offset generated from the first chopper and therefore all sources of DC offset are eliminated in this interface device without bandwidth limitation.
    Type: Application
    Filed: July 8, 2008
    Publication date: June 4, 2009
    Applicant: The Chinese University of Hong Kong
    Inventors: Kong Pang Pun, Chiu Sing Oliver Choy
  • Patent number: 7489084
    Abstract: A power supply apparatus for supplying predetermined supply voltages respectively to an anode electrode, a cathode electrode, a collector electrode, and a helix of an electron tube. The power supply apparatus comprises an anode switch for turning on/off the anode voltage output, and an anode switch control circuit for controlling the on/off operation of the anode switch such that a pulsed anode voltage is repeatedly applied to the anode electrode a plurality of times at a predetermined period when operation of a helix power supply and a collector power supply is stopped.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: February 10, 2009
    Assignee: NEC Microwave Tube, Ltd.
    Inventors: Junichi Kobayashi, Eiji Fujiwara
  • Publication number: 20080001659
    Abstract: A passive amplifier structure capable of multiplying the voltage of an input signal is provided. In a first stage, a first and a second capacitance are connected between a first and a second input port of a balanced input port in response to a first oscillator signal. In a second stage, in response to a second oscillator signal having a phase different from that of the first oscillator signal, the first capacitance is connected between the first input port and a third capacitance and the second capacitance is connected between the second input port and the third capacitance. An output voltage over the third capacitance is obtained from terminals of the third capacitance. Presented embodiments also describe an automatic gain control feature.
    Type: Application
    Filed: February 16, 2007
    Publication date: January 3, 2008
    Inventor: Risto Vaisanen
  • Patent number: 6294945
    Abstract: A system and method, wherein the dielectric absorption of a capacitor is cancelled by a compensating circuit. One embodiment uses a compensation circuit comprising a compensating capacitor with substantially identical characteristics as the capacitor to be compensated in an integrator circuit. The effects of the dielectric absorption of the capacitor in the integrator circuit are reduced or eliminated because the dielectric absorption of the compensating capacitor cancels the dielectric absorption of the capacitor in the integrator circuit. Another embodiment uses compensation circuitry to reduce or eliminate the effects of dielectric absorption in any particular capacitor. The compensation capacitor in the compensation circuitry has a higher rate of dielectric absorption and a lower capacitance value than the capacitor whose dielectric absorption effects are to be reduced or eliminated.
    Type: Grant
    Filed: February 2, 2000
    Date of Patent: September 25, 2001
    Assignee: National Instruments Corporation
    Inventors: Christopher G. Regier, Clayton Daigle
  • Patent number: 4622510
    Abstract: A parametric electric machine consists of a series resonant circuit, which has a capacitance (C) which is adapted to be mechanically varied, an inductance (L) and a resistance (R). The no-load values of the capacitance (C.sub.o), inductance (L.sub.o) and resistance (R.sub.o) fulfill the threshold condition ##EQU1## and at least one of the parameters L, R and C of the resonant circuit is a function of the current flowing in the resonant circuit.
    Type: Grant
    Filed: June 24, 1983
    Date of Patent: November 11, 1986
    Inventor: Ferdinand Cap
  • Patent number: 4560914
    Abstract: A controlled supply device for a capacitive load with high voltage signals includes a circuit that produces an alternate low voltage control signal, an input capacitor which displays a capacitance which is much lower than that of the capacitive load, a non-linear high voltage element comprising an active tripole with a control dipole, where one of the poles of the control dipole is connected to the input capacitor while the other pole of the control dipole is connected to the output capacitive load, and a quick low leak, low capacitance diode which is connected between the two poles of said control dipole so as to comprise a closed circuit with the latter which accepts a current that flows in only one direction under normal operating conditions. The device enables real time control of the high voltage signal that is applied to the capacitive load.
    Type: Grant
    Filed: March 19, 1984
    Date of Patent: December 24, 1985
    Assignee: ETAT Francais
    Inventors: Fernande F. Lafonta, Paul A. Lafonta
  • Patent number: 4138665
    Abstract: A preamplifier using charge transfer techniques is formed on the same chip as a charge transfer analog to digital converter. The preamplifier then couples low level output sensors directly to the converter without need for a costly interfacing amplifier.
    Type: Grant
    Filed: September 21, 1977
    Date of Patent: February 6, 1979
    Assignee: General Electric Company
    Inventors: Charles W. Eichelberger, Walter J. Butler
  • Patent number: 3939468
    Abstract: A differential charge amplifier for use in towed marine seismic streamers and the like involving towed hydrophone arrays wherein the hydrophone outputs are conducted by long twisted pairs of leads to signal processing equipment, the differential charge amplifier including operational amplifiers connected to form charge amplifier stages having resistance-capacitance feedback circuits and a differential amplifier stage coupled to the charge amplifier outputs providing cancellation of common mode signals.
    Type: Grant
    Filed: January 8, 1974
    Date of Patent: February 17, 1976
    Assignee: Whitehall Corporation
    Inventor: Robert H. Mastin