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9042857 Methods, systems, and non-transitory computer readable media for wideband frequency and bandwidth tunable filtering  
Methods, systems, and computer readable media for wideband frequency and bandwidth tunable filtering are disclosed. According to one aspect, the subject matter described herein includes a wideband...
9019006 Reference voltage stabilizer circuit and integrated circuit including the same  
A reference voltage is maintained stable against disturbance noise and self-noise of an internal circuit. A reference voltage stabilizer circuit for stabilizing the reference voltage to be...
9020018 Systems for calibration of wireless electronic devices  
A calibration system may be provided for calibrating wireless communications circuitry in an electronic device during manufacturing. The calibration system may include data acquisition equipment...
9013233 Interface for MEMS inertial sensors  
In a high-performance interface circuit for micro-electromechanical (MEMS) inertial sensors, an excitation signal (used to detect capacitance variation) is used to control the value of an...
9013234 Transconductance adjustment circuit, circuit device, and electronic apparatus  
A transconductance adjustment circuit includes a reference signal generation circuit that outputs a first signal and a second signal that is different by 90 degrees in phase from the first signal,...
9000838 Method and apparatus for reducing interference  
A method and apparatus is provided for reducing interference in circuits. A management strategy is provided to reduce reference spurs and interference in circuits. The management strategy uses a...
9000839 Low distortion filters  
An integrated continuous-time active-RC filter comprises a set of opamp integrators with Operational Transconductance Amplifiers (OTAs), and at least one assistant transconductor connected between...
8970293 Active RC filter having gain-setting attenuator  
Disclosed herein are embodiments of an active RC filter that has a gain-setting attenuator. An embodiment takes the form of a filter circuit having a filter-circuit input node; a filter-circuit...
8970292 Universal filter implementing second-order transfer function  
An apparatus includes a biquad filter having first and second lossy integrators and multiple input networks. Each lossy integrator includes an amplifier, and each input network is coupled to an...
8963629 Variable admittance circuit  
A programmable variable admittance circuit may be used in a programmable filter or a variable gain amplifier in a number of different applications including tuners and other RF receiver circuits....
8963628 Transistor-based filter for inhibiting load noise from entering a power supply  
A transistor-based filter for inhibiting load noise from entering a power supply is disclosed. The filter includes a first transistor having an emitter coupled to a power supply, a collector...
8954026 Electronic device with adjustable filter and associated methods  
An electronic device includes an adjustable filter with a first filter element, and a second filter element coupled to the first filter element. The second filter element includes a field effect...
8937506 Rotating coefficient filter  
A circuit that provides a rotating coefficient FIR filter with all necessary coefficient sets present at the same time, without the need for delay elements or devices providing for adjustable...
8928398 Differential analog signal processing stage with reduced even order harmonic distortion  
The even order harmonic distortion in a differential circuit is reduced or eliminated by treating the amplitude and phase mismatch sources that cause the distortion as impedance mismatches, and...
8917138 Noise filtering circuit and operating method thereof  
There are provided a noise filter circuit and an operating method thereof. A noise filter circuit includes a first delay circuit, and a second delay circuit connected to the first delay circuit in...
8912844 Semiconductor structure and method for reducing noise therein  
The present invention provides a semiconductor structure, including a substrate, a first TSV, an inductor and a capacitor. The first TSV is disposed in the substrate and has a first signal. The...
8878602 Reducing noise effects in an electronic computing device  
Approaches are described for managing effects such as interference, crosstalk, and other types of noise in an electronic environment using a physical and/or electronic switch to improve antenna...
8872573 Gain control with multiple integrators  
A method according to one embodiment includes receiving an increment signal at a first integrator when a second integrator overflows; receiving a decrement signal at the first integrator when the...
8866541 Distortion cancellation in analog circuits  
Embodiments of the present invention may provide an improved apparatus and method for reducing distortion in analog circuits. A circuit in accordance with the present invention may include a main...
8866542 Low frequency filter for biomedical applications  
The low frequency filter for biomedical applications scales down the pole frequency while accomplishing a 5-bit reduction in the cut off frequency. This is made possible through adding a passive...
8860504 Method and apparatus for measuring biological signal  
An apparatus for measuring a biological signal of a body, the apparatus including; at least three interfaces which obtain signals from the body, a signal application unit which applies a signal...
8854122 Active interference-noise cancellation device, and a method in relation thereto  
An active noise cancellation device (2) for a medical device includes an active circuit having a first input connection (8), a second input connection (10), and an output connection (12). The...
8847642 Charge pump phase-locked loop circuits  
A charge pump phase-locked loop circuit includes an active loop filter, an adjustable reference voltage source, and a charge pump. The active loop filter includes an amplifier that has a negative...
8841962 Leakage compensation for switched capacitor integrators  
Methods and systems for a differential correlated double sampling (CDS) switched capacitor integrator circuit. The circuit includes a differential amplifier that has a differential input and a...
8836416 Tuning circuitry and method for active filters  
Embodiments of the present invention may include a filter with programmable components, a tuning signal generator, a comparator, and a feedback system. The tuning signal generator may input first...
8829984 Secure modulation and demodulation  
A system and method are disclosed for securely transmitting and receiving a signal. A nonlinear keying modulator is used in the transmitter to encrypt the signal using a nonlinear keying...
8823448 Feed forward active EMI filters  
An apparatus for active feed forward electromagnetic interference (EMI) filtering, including, a noise detection circuit that receives EMI noise occurring at a noise source, and an active feed...
8823465 Clock generator for crystal or ceramic oscillator and filter system for same  
A clock generator is disclosed for use with an oscillator device. The clock generator may include a signal conditioning pre-filter and a comparator. The signal conditioner may have an input for a...
8816762 Area-optimized analog filter with bandwidth control by a quantized scaling function  
A programmable active frequency-selective circuit includes a first capacitor having a fixed value and a second capacitor coupled in parallel to the first capacitor and having a plurality of...
8816760 Capacitor amplifying circuit and operating method thereof  
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...
8803596 Differential source follower having 6dB gain with applications to WiGig baseband filters  
Sallen-Key filters require an operational amplifier with a large input impedance and a small output impedance to meet the external filter characteristics. This invention eliminates the need for...
8805314 Filter circuit and receiving device  
To implement a filter circuit with low noise and a low cutoff frequency in a smaller area, a filter circuit has a first circuit which receives an input signal supplied to an input terminal,...
8797111 Poly-phase filter, and a single-side band mixer including the same  
A 4-phase filter includes four filter units including resistors and capacitors which inputs input signals, and provides the input signal via a switch buffer to a secondary capacitor provided in...
8797097 Filtering device with low-pass filtering function and band-pass filtering function  
A filtering device, applicable in a transceiver, includes: a capacitive circuit coupled to an amplifying circuit by a first capacitive configuration or by a second capacitive configuration; and a...
8791736 Adjustable pole and zero location for a second order low pass filter used in a phase lock loop circuit  
This invention provides a loop filter device and a method for IC designers to adjust the pole or zero location of a phase lock loop (PLL) circuit. The pole and zero location are controlled by an...
8779831 Integrator  
An integrator (100) comprises an amplification and phase shifting element (170) with a feedback path (130) forming a loop and comprising a capacitive element (140). An input signal is summed into...
8766712 Quality factor tuning for LC circuits  
Apparatus and methods are also disclosed related to tuning a quality factor of an LC circuit. In some implementations, the LC circuit can be embodied in a low-noise amplifier (LNA). A quality...
8760198 Low voltage line driver  
A line driver includes a transconductance stage that senses a differential voltage present at differential output nodes. The transconductance stage replicates a fraction of the differential...
8754699 Switched-capacitor filter  
A filter is implemented as cascaded stages, and in at least one stage all resistances are implemented as double-sampled switched-capacitor circuits. In a variation, at least one resistance is...
8736359 Signal processing method, information processing apparatus, and storage medium for storing a signal processing program  
This invention provides a signal processing technique of suppressing various kinds of noise including unknown noise without storing a number of pieces of noise information in advance. To...
8723567 Adjustable pole and zero location for a second order low pass filter used in a phase lock loop circuit  
This invention provides a loop filter device and a method for IC designers to adjust the pole or zero location of a phase lock loop (PLL) circuit. The pole and zero location are controlled by an...
8717094 Charge sharing time domain filter  
An approach to time domain filtering uses a passive charge sharing approach to implement an infinite impulse response filter. Delayed samples of an input signal are stored as charges on capacitors...
8710919 Data processing method  
For an input signal with a ringing superposed thereon, a ringing-generating filter generates an analogous ringing waveform from only a peak portion of the signal which precedes the ringing. A...
8710920 Charge domain filter and method thereof  
A charge domain filter (CDF) and a method thereof are provided. The CDF includes an amplifier, a first switch-capacitor network (SCN), a second SCN, a third SCN and a fourth SCN. Input terminals...
8688067 Sampling circuit and receiver using same  
A sampling circuit and a receiver are provided having a high flexibility of filter design and excellent characteristics for removing an interfering wave. Provided also are a sampling circuit and a...
8686788 Filter circuit  
A circuit and method for filtering a signal. An amplifier receives an input signal and generates a differential output signal. A first resonator having series and parallel resonant frequencies is...
8674753 Systems and methods for cancelling phase-locked loop supply noise  
One embodiment of an apparatus for cancelling supply noise includes an input circuit operable to receive an input from a charge pump and a drive circuit connected to an output of the input...
8664987 Filtering circuit, phase identity determination circuit and delay locked loop  
A filtering circuit includes a clock selection unit configured to transfer a first clock or a second clock having a frequency lower than the first clock as an operating clock in response to a...
8665011 Micro electro-mechanical system circuit capable of compensating capacitance variation and method thereof  
A micro electro-mechanical system (MEMS) circuit includes a MEMS differential capacitor, a read-out circuit, a control circuit, and a compensation circuit. The MEMS differential capacitor includes...
8648652 Band pass filter and calibration method for band pass filter  
A band pass filter has a high pass filter into which an input signal is input; an amplifier having an inverting input terminal into which an output of the high pass filter is input, wherein the...