|
Match
|
Document |
Document Title |
|
|
7622985 |
Active compensation filter
An active compensation filter for the application in the electric power supply in a land vehicle, which comprises a high-pass filter which is to be coupled with a supply voltage line which carries...
|
|
|
7616052 |
Fast adapting filter
Adjustable gain circuits (AGCs) within serial filter stages are initialized to maximum gain. The output of each AGC is then sampled and converted to digital representation for use by control logic...
|
|
|
7610022 |
Filter circuit with negative transconductance
Apparatus, systems, and methods implementing techniques for filtering signals are described. A filter circuit receives an input signal and produces a corresponding filtered signal. The filter...
|
|
|
7596195 |
Bandpass filter with reversible IQ polarity to enable a high side or low side injection receiver architecture
The invention enables a reversing IQ polarity in a bandpass filter so that the bandpass filter can filter signals with high side or low side injection.
|
|
|
7592864 |
High-order low-pass filter circuit and method
A low-pass filtering circuit and method are disclosed. The circuit includes a low-pass filter with a capacitor, and a multiplier configured to multiply the capacitance of the capacitor by...
|
|
|
7592863 |
Optimized gain filtering technique with noise shaping
A noise shaping and voltage gain filtering third order electrical circuit and method comprises at least one pair of input resistors; a Frequency Dependent Negative Resistance (FDNR) filter...
|
|
|
7589575 |
Precision integrated phase lock loop circuit loop filter
A loop filter in a phase lock loop circuit comprising a reference precision resistor, a first FET and a second FET, wherein the gate of the first FET is tied to the gate of the second FET, and a...
|
|
|
7587010 |
Complex filter circuit and receiver circuit
A pseudo-image signal producing section produces a pseudo-image signal imitating an actual image signal. An amplitude detection section detects the amplitude of the pseudo-image signal having...
|
|
|
7586366 |
Complex filter circuit
Disclosed is a complex elliptic filter having an order of three or higher which receives two differential signals that differ in phase from each other by 90 degrees are applied and outputs two...
|
|
|
7583136 |
Active filter for reduction of common mode current
An active filter for reducing the common mode current in a pulse width modulated drive circuit driving a load, said drive circuit comprising an a-c source, a rectifier connected to said a-c source...
|
|
|
7574317 |
Method for calibrating a filter, a calibrator and system including the same
An example embodiment provides a method for calibrating an active RC filter and RC time constant calibrator for an active RC filter. The RC time contact calibrator includes a RC timer and a...
|
|
|
7573326 |
Forwarded clock filtering
A tunable bandpass filter to provide a filtered differential clock signal in response to an input differential clock signal, where an embodiment comprises a transistor pair loaded by tunable loads,...
|
|
|
7570690 |
Adaptive equalizer with a dual-mode active taps mask generator and a pilot reference signal amplitude control unit
An adaptive equalizer including an equalizer filter and a tap coefficients generator used to process a sample data stream derived from a plurality of received signals is disclosed. The tap...
|
|
|
7554388 |
Integrated circuit apparatus
According to an aspect of an embodiment, an apparatus comprises:
a first current source and a second current source; a resistor connected between the first current source and a reference...
|
|
|
7546230 |
Electromagnetic response model with improved high frequency stability
A model for modeling electromagnetic response in a conductor and in dielectric, a method of modeling the electromagnetic response in the conductor and dielectric and a program product therefor....
|
|
|
7541863 |
Transferred-impedance filtering in RF receivers
The specification and drawings present a new method and apparatus for using transferred-impedance filtering in RF (radio frequency) receivers (e.g., inside of a mobile communication device),...
|
|
|
7539243 |
Method and system for low-power integrating decision feedback equalizer with fast switched-capacitor feed forward path
A method and system for decision feedback equalization for digital transmission systems is provided. Low-power integrating decision feedback equalization with fast switched-capacitor paths are...
|
|
|
7535289 |
Integrated RC filter
An integrated RC filter comprises a first resistor being coupled to a first capacitor through a first node and a signal input of said integrated RC filter is coupled through one of the first...
|
|
|
7532045 |
Low-complexity active transconductance circuit
An active transconductance is provided by converting an input voltage into a current, and providing the current to a node which is maintained at a generally fixed voltage. Current is mirrored from...
|
|
|
7525372 |
Noise shaped n th order filter
A low noise nth order filter, system, and method includes a plurality of nested general immittance converters (GICs) operatively connected to one another in successive GIC stages; and a capacitor...
|
|
|
7521991 |
Balanced band-pass filter for radio receivers
A filter includes an input and an output. First and second filter stages having respective stage inputs and stage outputs are connected in cascade between the input and the output. Each filter...
|
|
|
7521990 |
Noise reduction circuits
A noise reduction circuit for AC power, AC power neutral lines, and DC power. In a first embodiment for use with AC power, the invention operates by subtracting the error voltage from an incoming...
|
|
|
7518429 |
Delay circuit
A delay circuit ( 12 ) includes a resistor (R 1 ), a capacitor (C), and a discharging circuit ( 14 ). The discharging circuit includes a PNP transistor (Q 1 ) and an NPN transistor (Q 2 ). The...
|
|
|
7518428 |
Phase compensation circuit and power circuit having same
In a phase compensation circuit having a resistance connected to the output side of an error amplifier, a capacitor, and a conductance amplifier functioning as a capacitance amplifier circuit,...
|
|
|
7514990 |
Very low frequency high pass filter
A variable frequency module controls a cutoff frequency of a high pass filter and includes a resistive element that communicates with a capacitive element of the high pass filter. A first...
|
|
|
7511570 |
Transconductance filtering circuit
A transconductance filtering device with a flexible architecture that can selectively present a different topology and/or order beginning with the same initial structure is disclosed. For example,...
|
|
|
7504879 |
Transconductor and filter circuit
A transconductor and filter circuit is described. In one embodiment, a front end module within the transconductor and filter circuit converts a differential input voltage signal into a differential...
|
|
|
7501901 |
Circuit comprising a capacitive circuit component
A circuit has a first capacitive circuit component, having a first terminal and a second terminal, and an amplifier, having a first input and an output, the first input coupled to the first...
|
|
|
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...
|
|
|
7492216 |
Filtering apparatus for correcting variation of CR-product
A filtering apparatus includes a main filter, a variation detection circuit, and a variation correction circuit. The variation detection circuit includes a reference filter having at least one...
|
|
|
7486214 |
Tuning methods for loop-filters of continuous-time sigma-delta modulators
Techniques for tuning filters of modulation circuits are described herein.
|
|
|
7477099 |
Filter adjustment circuit
In a filter adjustment circuit for an analog filter circuit such as a Gm-C filter, an input signal IS from a reference signal generation circuit 1 is inputted to a Gm-C filter 2 to be filtered...
|
|
|
7477098 |
Method and apparatus for tuning an active filter
A tuning circuit for tuning an active filter includes a resistor-capacitor circuit comprising a variable capacitor and a resistor equivalent to a first resistor and a second resistor serially...
|
|
|
7471142 |
Filter calibration with cell re-use
Various embodiments are disclosed relating filter calibration with cell re-use. According to an example embodiment, an apparatus includes a first circuit, including a variable circuit element. The...
|
|
|
7471141 |
Filter circuit
Disclosed is a filter circuit with an order of three or more, comprising at least one means for amplifying an in-band signal, wherein the frequency response of the filter output has a desirable...
|
|
|
7468629 |
Tuning circuit for transconductors and related method
Tuning circuits and related method for tuning transconductance in a transconductor-capacitor (Gm-C) filter system are provided. In the tuning circuit, a periodic input signal with constant...
|
|
|
7466175 |
Capacitance multiplier circuit
An integrated circuit including a capacitance multiplier having reduced parasitics and injected noise compared to conventional multiplier methods. The integrated circuit includes a reference...
|
|
|
7459963 |
Filter apparatus including differential slave gm-C filter with frequency characteristics automatically tuned by master circuit
In a filter apparatus including a master circuit for receiving a reference frequency signal having a reference frequency to generate a control voltage and a slave gm-C filter formed by at least one...
|
|
|
7459962 |
Transient signal detection algorithm using order statistic filters applied to the power spectral estimate
A non-linear, order-statistic filter that is able to detect transients within an ambient signal environment without the transients affecting the setting of the transient detection threshold. The...
|
|
|
7449942 |
Intrinsic RC power distribution for noise filtering of analog supplies
Analog supply for an analog circuit and process for supplying an analog signal to an analog circuit. The analog supply includes a noise filter having a variable resistor, and a control device...
|
|
|
7436250 |
Highly selective filtering device and corresponding filtering method
The invention proposes a filtering device having a frequency response which is symmetrical, using asymmetrical filters coupled by transposition means. The advantageous characteristics of the...
|
|
|
7436249 |
Circuit and method for filtering a radio frequency signal
A circuit for filtering a radio frequency signal at a given frequency comprises an input terminal, a filter device, and an active AC shunt circuit having first and second input terminals and an...
|
|
|
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...
|
|
|
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...
|
|
|
7424053 |
Channel equalization in data receivers
Channel equalization in a 1000BASE-T receiver is performed by a fixed mode analog filter 2 suitable for the longest possible cable length, by a FFE ( 3 ), and by a digital filter 4 . The digital...
|
|
|
7423474 |
Selectable pole bias line filter
A current mirror with selectable filter poles provides a selected low pass filtering function to a DC bias signal generated by the current mirror. Coupled between a first MOSFET and second MOSFET...
|
|
|
7417495 |
Reconfigurable frequency filter
There are various mobile communication standards such as GSM, EDGE, and W-CDMA. For a GSM or EDGE system, a receiver must be configured to work with an IF signal with a center frequency and...
|
|
|
7414461 |
Linearization technique for current mode filters
A circuit is disclosed that compensates for the non-linearity of a current mode real pole producing circuit used to generate poles and zeros in complex filter circuits. The non-linearity of the...
|
|
|
7411444 |
Technique for improving antialiasing and adjacent channel interference filtering using cascaded passive IIR filter stages combined with direct sampling and mixing
A technique of improving antialiasing and adjacent channel interference filtering uses cascaded passive IIR filter stages combined with direct sampling and mixing. The methodology and related...
|
|
|
7403063 |
Apparatus and method for tuning center frequency of a filter
A tuning method and a tuning apparatus for tuning a filter are disclosed. The tuning method includes: configuring the filter as a VCO; utilizing the VCO to generate an oscillation signal according...
|