Quotables
"This is the patent age of new inventions for killing bodies, and for saving souls. All propagated with the best intentions."
Lord Byron ;
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8164380 | Discrete filter, sampling mixer and wireless device A sampling filter of such circuitry as not requiring a high frequency REF signal even if the number of decimation is decreased. In the sampling filter, the rotate capacitor in each switched capacitor circuit including Cr (7a-7d) arranged ... | 04/24/2012 |
| 8159286 | System and method for time-to-voltage conversion with lock-out logic An event time stamping system comprising a current source, an integrator comprising an input and an output, and configured to output a voltage proportional to the length of time the current source is coupled to the input, and one or more switches configured to coupl... | 04/17/2012 |
| 8044712 | Circuit and method for improved frequency resolution of wide-bandwidth digitally programmable RC active filters An active RC filter (20) includes a first resistive element (23) and a first capacitor array (10/50) which co-acts with the first resistive element (23) to determine a bandwidth characteristic of the programmable active RC filter circuit ... | 10/25/2011 |
| 8030992 | Low-pass filter A low-pass filter of the present invention comprises a plurality of filter units and a regulation unit. The filter units are coupled in series with each other and receive an input signal to filter the input signal for generating an output signal. The regulation unit... | 10/04/2011 |
| 8018272 | Filter circuit and communication device There is provided a filter circuit that includes a flying capacitor and a capacitor that is provided in parallel with the flying capacitor, between an input terminal and an output terminal of the flying capacitor. As the capacitor that has a predetermined capacity i... | 09/13/2011 |
| 8013670 | Method, apparatus, and system for obtaining tuning capacitance for Gm-C filter The present invention discloses a method, apparatus and system for obtaining the tuning capacitance of a Gm-C filter. The method includes: integrating a simulated capacitor within a given time via a current, where the simulated capacitor simulates the capacitor of t... | 09/06/2011 |
| 7994850 | Discrete time multi-rate analog filter A discrete time analog filter suitable for use in a receiver and other electronics devices is described herein. In one exemplary design, an apparatus may include a transconductance amplifier, a sampler, and a discrete time analog filter. The transconductance amplifi... | 08/09/2011 |
| 7982534 | Charge domain filter A charge domain filter having a phase divider, first switched capacitor networks, second switched capacitor networks and a connecting circuit. The phase divider receives a first and a second input signal to output first phase divided signals based on the first input... | 07/19/2011 |
| 7965135 | Charge sampling filter circuit and charge sampling method To provide a charge sampling filter circuit and a charge sampling method. A charge sampling filter circuit includes a first capacitor that samples an input signal, and in which at least a portion of electric charge stored in the first capacitor by sampling is... | 06/21/2011 |
| 7907004 | Signal processing apparatus, filter apparatus, signal processing method and filtering method There is provided a signal processing apparatus including a variable capacitor and a switching portion for switching the circuit mode between a sampling mode, in which the variable capacitor samples an input signal, a holding mode, in which a charge gained by sampli... | 03/15/2011 |
| 7902916 | Switched capacitor resonator and sigma-delta modulator using the same Provided is a switched capacitor resonator including at least one integrator circuit having a differential operational amplifier and a sub feedback circuit configured with a switched capacitor circuit. A main feedback circuit connecting main input and output termina... | 03/08/2011 |
| 7847625 | Switched capacitor circuit with reduced leakage current Provided is a switched capacitor circuit which prevents leakage current by equalizing voltages at nodes where leakage current tends to flow in a sampling mode, and prevents errors in an output signal by minimizing voltage drop caused by leakage current in an integra... | 12/07/2010 |
| 7696814 | Filter circuit and method thereof A filter circuit is disclosed which comprises a differential amplifier and a switch-capacitor circuit. The invention attains the goals of reducing the power consumption and the circuit size by sharing an amplifier with other related circuits to reduce the number of ... | 04/13/2010 |
| 7652526 | Narrow band pass filter A switched capacitor narrow band pass filter includes a first switch including a first pole movable between two first switch terminals, a second switch including a second pole moveable between second switch terminals, and a third switch including additional poles mo... | 01/26/2010 |
| 7636012 | Charge domain filter device A charge domain filter device includes a SINC filter with a frequency characteristic expressed by a SINC function, and a bandpass filter connected to an output end of the SINC filter and having a frequency characteristic with a particular center frequency. ... | 12/22/2009 |
| 7629837 | Noise reduction for switched capacitor assemblies An integrated circuit comprises an assembly of switched capacitors operated under control of a system clock signal. It further comprises a signal driver for generating a binary output signal at an output pad. The system clock signal is suppressed for a certain time ... | 12/08/2009 |
| 7535288 | Charge domain filter device There is provided a charge domain filter device including a plurality of transconductors each of which converts an input voltage to a current and outputs the current and a filter unit that filters output signals from said plurality of transconductors by repeatedly c... | 05/19/2009 |
| 7501885 | Filter circuit A filter circuit includes a voltage amplifier, a resistor, a capacitor, and an analog switch connected between the voltage amplifier and the capacitor. When the voltage amplifier is turned on, the analog switch is opened so that the capacitor is disconnected from th... | 03/10/2009 |
| 7495508 | Switched capacitor notch filter circuits Switched capacitor notch filter circuits are disclosed. An example switched capacitor notch filter circuit described herein includes a switched capacitor amplifier to receive an input signal and a first feedback signal, to amplify the input signal and the first feed... | 02/24/2009 |
| 7459964 | Switched capacitor filter and feedback system A loop filter (30) includes a first capacitor (31) provided between an input terminal for a current signal and a reference voltage, a switched capacitor circuit (32) provided between the input terminal and the first capacitor (31) and a s... | 12/02/2008 |
| 7429889 | Control system for programmable filters Control system for programmable filters, master-slave calibration system and fully programmable high precision filter for use in such control system, such filters being provided with a filter input and a filter output including a first, first order low pass filter s... | 09/30/2008 |
| 7425863 | Tuneable filters using operational amplifiers A low pass filter includes a switchable resistor bank, a gain stage, and a capacitor bank. The resistors and capacitors switched into the circuit determine a cutoff frequency of the low pass filter. Frequency programmability may be obtained using the switchable resi... | 09/16/2008 |
| 7423458 | Multiple sampling sample and hold architectures A sample and hold circuit architecture samples using two capacitors that are cyclically switched between charge and discharge modes. The sample and hold circuit includes a buffer to receive an input signal to be sampled, a first sampling capacitor, a second sampling... | 09/09/2008 |
| 7408417 | Filter automatic adjustment apparatus, filter automatic adjustment method, and mobile telephone system The invention provides a filter automatic adjustment apparatus and method, and a mobile telephone system, which realizes low power consumption while adjusting a characteristic frequency of a main filter having an adjustment function to a target frequency. The filter... | 08/05/2008 |
| 7394309 | Balanced offset compensation circuit Balanced offset compensation is provided for a differential amplifier circuit. Two sets of three switches are employed between respective inputs and outputs of the differential amplifier to shunt the outputs to the input terminals during auto-zeroing phase. By openi... | 07/01/2008 |
| 7385439 | Analog switch having a minimized external flow of leakage current and switched capacitor filter incorporating the analog switch An analog switch used in a switched capacitor filter has N-channel and P-channel MOS FETs connected in parallel between input and output switch terminals, with capacitor charge currents being periodically produced from the output terminal. The filter derives an outp... | 06/10/2008 |
| 7373627 | Method of designing wiring structure of semiconductor device and wiring structure designed accordingly A method of designing a wiring structure of an LSI is capable of reducing a capacitance variation ratio ΔC/C or a resistance-by-capacitance variation ratio Δ(RC)/(RC) of the wiring structure. The method sets a process-originated variation ratio (δP) fo... | 05/13/2008 |
| 7365597 | Switched capacitor amplifier with higher gain and improved closed-loop gain accuracy A switched capacitor CMOS amplifier uses a first stage non-inverting CMOS amplifier driving a second stage inverting CMOS amplifier. The first stage amplifier is provided with positive feedback to substantially increase the gain of the first stage amplifier. In the ... | 04/29/2008 |
| 7339442 | Baseband RC filter pole and on-chip current tracking system An apparatus and method are provided for tracking the poles of an integrated RC filter as well as the absolute value of a current source. A single tracking oscillator contains integrated elements such as a programmable resistor and fixed capacitor or a programmable ... | 03/04/2008 |
| 7339418 | Differential filter topology with dielectric absorption cancellation for a data acquisition device In one embodiment, a differential filter is configured using a differential operational amplifier (op-amp) with two feedback RC networks, each RC network coupled between a respective input and a respective output of the op-amp. Two capacitive elements may each provi... | 03/04/2008 |
| 7339415 | SC circuit arrangement The invention relates to a linear SC circuit arrangement using integrated deep submicron technology, having at least one switched capacitor circuit which is connected to an input for inputting an input signal and which has at least one switchable capacitor and at le... | 03/04/2008 |
| 7339420 | Method of switching PLL characteristics and PLL circuit A loop filter which is a component of a PLL circuit includes a switching element for switching a capacitance value which connects and disconnects a second capacitive element to a first capacitive element according to a natural angular frequency switching signal, and... | 03/04/2008 |
| 7336118 | Inverter apparatus To provide a highly reliable inverter apparatus which discriminates long-cycle noise generated by the isolated signal transmission element from short-cycle dv/dt noise and induction noise. A low pass filter, band pass filter, and a switching means are provided betwe... | 02/26/2008 |
| 7332941 | Analog switch circuit and sample-and-hold circuit including the same First and second analog switches are connected in series between first and second nodes. One terminal of a third analog switch is connected to a series connection node of the first and second analog switches. The other terminal of the third analog switch is supplied... | 02/19/2008 |
| 7327182 | Switched capacitor filter and feedback system A switched capacitor filter comprises three switched capacitor circuits. Each switched capacitor circuit has a capacitance. A first state that the capacitance is connected to an input end of a current signal, a second state that the capacitance is connected to an ou... | 02/05/2008 |
| 7324028 | Self-calibrating continuous-time delta-sigma modulator A self-calibrating continuous-time delta-sigma modulator determines whether time constants of its internal integrators are too large or too small by injecting a calibrating sequence into the modulator and examining a correlation between the calibrating sequence and ... | 01/29/2008 |
| 7323928 | High capacitance integrated circuits An integrated circuit providing high equivalent capacitance ranging from a few tens of picofarads to a few nanofarads is presented. The integrated circuit includes active integrated circuit components, requires no external capacitor, and is substantially insensitive... | 01/29/2008 |
| 7321735 | Optical down-converter using universal frequency translation technology A method and system for converting an optical signal to electrical information signals, including demodulated baseband information signals and modulated baseband signals at multiple harmonics. In an embodiment, the optical information signal is amplitude modulated w... | 01/22/2008 |
| 7319731 | High precision continuous time gC BPF tuning High precision continuous time gmC BPF (Band Pass Filter) tuning. A novel approach is presented by which a continuous time signal serves as a BPF control voltage for tuning of a BPF within a communication device (e.g., transceiver or receiver). A PLL (Pha... | 01/15/2008 |
| 7315200 | Gain control for delta sigma analog-to-digital converter Gain control for delta sigma analog-to-digital converter. A method is disclosed for driving the input of an integrator in a delta-sigma converter having an amplifier with a non-inverting input, an output and a positive input connected to a reference voltage and an i... | 01/01/2008 |
