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| Application No. | Application Title | Issue Date |
| 20110230157 | EQUIVALENT RADIO FREQUENCY NOTCH FILTER, RADIO FREQUENCY CHIP, AND RECEIVER An equivalent radio frequency (RF) notch filter, an RF chip, and a receiver are provided. The equivalent RF notch filter includes: a local oscillation (LO) circuit, configured to provide a LO frequency signal; configured to be connected in parallel with the main chain, ... | 09/22/2011 |
| 20110142093 | LOW VOLTAGE MIXER CIRCUIT FOR A UWB SIGNAL TRANSMISSION DEVICE The low voltage mixer circuit can be fitted to a UWB signal transmission device. The circuit includes first and second differential pairs of NMOS transistors (M5, M6, M7, M8), wherein the source of the transistors (M5, M6) of th... | 06/16/2011 |
| 20110037510 | MIXER CIRCUIT In a mixer circuit, addition of analog signals by capacitive coupling is used and square-law characteristics of the drain current of a MOS transistor operating in a saturated region are used. With this configuration, the voltage and power of the mixer circuit can be red... | 02/17/2011 |
| 20100327941 | Transimpedance Amplifier Input Stage Mixer A Gilbert cell mixer design is disclosed. Instead of using a differential transconductance stage as typically done, the design employs a differential transimpedance amplifier input stage. By utilizing a transimpedance input stage to the Gilbert mixer, feedback is used t... | 12/30/2010 |
| 20100321086 | POWER AND IMPEDANCE MEASUREMENT CIRCUITS FOR A WIRELESS COMMUNICATION DEVICE Exemplary embodiments disclosed are directed to power and impedance measurement circuits that may be used to measure power and/or impedance are described. A measurement circuit may include a sensor and a computation unit. The sensor may sense (i) a first voltage signal ... | 12/23/2010 |
| 20100301920 | MIXER WITH HIGH LINEARITY A mixer is provided. The transconductance stage receives an input signal through an input node and outputs an output signal through an output node. The transconductance stage includes a first transistor coupled between the output node and a first power node, having a fi... | 12/02/2010 |
| 20100264979 | MIXER CIRCUIT In a mixer circuit, addition of analog signals by capacitive coupling is used and square-law characteristics of the drain current of a MOS transistor operating in a saturated region are used. With this configuration, the voltage and power of the mixer circuit can be red... | 10/21/2010 |
| 20100219875 | Mixer Capable of Improving Signal Quality A mixer includes a transduction circuit, a first and a second switch circuit, and a first and a second load circuit. The transconductor circuit is for generating a differential current signal according to a differential voltage signal. The first switch circuit and the f... | 09/02/2010 |
| 20100188132 | METHOD FOR PROVIDING A VERY LOW REFERENCE CURRENT A system that includes: multiple transistors that comprise a first transistor that is maintained in a weak inversion state; wherein sources of the multiple transistors are coupled to a low current source; wherein drains of the multiple transistors are coupled to a volta... | 07/29/2010 |
| 20100013545 | Temperature Compensation For RF Detectors Compensation for an RF detector includes components having different order temperature functions. The components are combined and may be adjusted by various numbers of user-accessible terminals to provide individual adjustment for factors such as operating frequency. In... | 01/21/2010 |
| 20090295454 | LOW VOLTAGE MIXER CIRCUIT A mixer circuit (102) for use in radio frequency (RF) equipment is disclosed. The mixer comprises a current source (Io) and a differential amplifier (Q1, Q2) connected to the current source and having input terminals (RF+, RF−) for receiving an RF... | 12/03/2009 |
| 20090262784 | MIXER CIRCUIT AND COMMUNICATION APPARATUS INCLUDING MIXER CIRCUIT A mixer circuit which outputs a first output signal and a second output signal, in which are mixed a first input signal and a second input signal, includes a first grounded source amplifier circuit which amplifies the first input signal, a second grounded source amplifi... | 10/22/2009 |
| 20090134932 | LOW FLICKER NOISE MIXER AND BUFFER Low flicker noise mixer and buffer. This design employs some native metal oxide semiconductor field-effect transistors (MOSFETs) (e.g., having no threshold voltage) within a passive mixer whose gates are driven using clock signals. These native MOSFETs maybe biased at o... | 05/28/2009 |
| 20090085663 | Transconductor Having High Linearity and Programmable Gain and Mixer using the Same A mixer having high linearity and an associated transconductor combining programmable gain amplifier and mixer functions are provided. The transconductor includes first and second resistors, a differential amplifier, first and second feedback circuits, and first and sec... | 04/02/2009 |
| 20080284489 | TRANSCONDUCTOR AND MIXER WITH HIGH LINEARITY A transconductor. The transconductor comprises first and second active device networks. The first active device network has a first node and a second node and comprises a first MOS transistor having a gate, a source coupled to the first node, and a drain coupled to the ... | 11/20/2008 |
| 20080180156 | MIXER CIRCUIT A mixer using a small signal differential model includes a load circuit, a switch quad, and a transconductor. The switch quad further including a first current path and a second current path is coupled to the load circuit. The connecting node of the switch quad and the ... | 07/31/2008 |
| 20080061859 | LOW NOISE MIXER WITH REDUCED DISTORTION A low noise RF mixer is described. The mixer of the present invention has excellent linearity due to reduction of second-order distortion. The mixer includes an inputting stage, a switching stage and a load stage. The inputting stage includes a switching pair and a tran... | 03/13/2008 |
| 20080061860 | Cmos-based receriver for communications applications A receiver and receiver front end having multiple independent differential inputs, multiple independent differential low-noise amplifiers, and two sets of double-balanced IQ mixers. The double-balanced mixers include cross-coupled PMOS devices that dynamically inject cu... | 03/13/2008 |
| 20080054955 | Radio frequency doubler When a signal of a double frequency is generated from the original signal, conventionally a 90-degree phase-shift circuit is necessary to suppress an output of a DC component and efficiently obtain a double wave. According to the present invention, an equal RF signal is... | 03/06/2008 |
| 20080042726 | Mixer amplifier and radiofrequency front-end circuit The mixer amplifier includes an amplification stage having a current source circuit and a plug filter adapted to modify the current circulating in the current source circuit. The amplification stage and a mixer stage amplify an incoming signal and transpose the frequenc... | 02/21/2008 |
| 20080036523 | CURRENT MODE MULTIPLIER BASED ON SQUARE ROOT VOLTAGE-CURRENT RELATIONSHIP OF MOS TRANSISTOR A current mode multiplier circuit is provided based on the square root; voltage-current relationship of an MOS transistor. The circuit includes first, second and third MOS transistors with a common aspect ratio, and first and second current sources that respectively pro... | 02/14/2008 |
| 20080001644 | Phase interpolator with output amplitude correction A phase interpolator generates a phase-interpolated output clock signal Z from two phase-offset input clock signals A and B, where the interpolation angle of the output clock is based on a weight value W. The phase interpolator has A-side and B-side circuitry, each havi... | 01/03/2008 |
| 20070273425 | De-emphasis system and method for coupling digital signals through capacitively loaded lines A system for de-emphasizing digital signals, such as address signals, boosts the level of the signals for one clock period prior to transmitting the signals through signal lines that may have a relatively large capacitance. The system may include a delay circuit that de... | 11/29/2007 |
| 20070268060 | METHOD AND CIRCUIT ARRANGEMENT FOR GENERATING A PERIODIC ELECTRIC SIGNAL WITH CONTROLLABLE PHASE The invention relates to the generation of an electric output signal with a specified frequency and a phase (P) dependent upon a control signal (x) by means of weighted superposition of several input signals (s1, s2, s1*, s2*), which have the... | 11/22/2007 |
| 20070229140 | Mixer A mixer includes first to fourth NMOS transistors, first and second switches, first to fourth current sources, a first impedance and a second impedance. The first NMOS transistor has a drain coupled to the first impedance and a drain of the third NMOS transistor, and a ... | 10/04/2007 |
| 20070170973 | Passive mixer with direct current bias Mixer circuits with direct-current bias are disclosed. An example embodiment of such a mixer includes a first differential transistor pair and a second differential transistor pair. The example mixer also includes first and second local oscillator signal terminals and f... | 07/26/2007 |
| 20070146044 | Quadrature mixer circuit and RF communication semiconductor integrated circuit A quadrature mixer circuit and an RF communication semiconductor integrated circuit capable of suppressing variations in secondary distortion while reducing the current consumption are provided. In a quadrature mixer circuit, even if local signals different by 90 degree... | 06/28/2007 |
| 20070132500 | System for reducing second order intermodulation products from differential circuits A passive CMOS differential mixer circuit with a mismatch correction circuit for balancing the electrical characteristics of the two output paths. Once the output paths of the differential circuit are balanced, or matched as closely as possible, second order intermodula... | 06/14/2007 |
| 20070126491 | CMOS mixer for use in direct conversion receiver Provided is a mixer for use in a direct conversion receiver. The mixer includes Field Effect Transistors (FETs), a current source (IBias), two load resistors (RLoad), another FET, and two inductors L1 and L2. The FET M21 constitutes a current bleedi... | 06/07/2007 |
| 20070052469 | Mixer-system with gain-blocks and switches Mixer-systems comprising gain-blocks (1-4) and switches (5-8) have a flexibility depending upon their configuration (insight) and are made more flexible (basic idea) by supplying data input signals to the gain-blocks (1-4) and o... | 03/08/2007 |
| 20070001741 | Interpolation A steering current generator for a phase interpolator has a multiplicity of fine phase adjustment current sources, each of which is switchable to direct its current to one or other of two summing nodes. The current of each of those two summing nodes is supplemented by r... | 01/04/2007 |
| 20060261875 | Mixer circuit, receiver comprising a mixer circuit method for generating an output signal by mixing an input signal with an oscillator signal The invention relates to a mixer circuit, a receiver comprising a mixer circuit, and a method of mixing an input signal with an oscillator signal. A mixer circuit 300 according to the invention comprises a first input node 301 and a second input node 30... | 11/23/2006 |
| 20060214720 | Hysteresis comparator A comparator includes a differential amplification circuit having differential input transistors and load transistors, an output transistor for outputting an output value of the comparator, a diode having a cathode connected to a ground, a current output circuit, a resi... | 09/28/2006 |
| 20060164149 | Mixer stage and method for mixing two signals having different frequencies A mixer stage is provided that includes an oscillator, a first input, a second input, a first output, a second output, a set of four controllable amplifier elements, and a first current source. The mixer stage further includes at least one second current source in addit... | 07/27/2006 |
| 20060158241 | CMOS-based receiver for communications applications A receiver and receiver front end having multiple independent differential inputs, multiple independent differential low-noise amplifiers, and two sets of double-balanced IQ mixers. The double-balanced mixers include cross-coupled PMOS devices that dynamically inject cu... | 07/20/2006 |
| 20060119413 | Loading circuit capable of canceling DC offset and mixer using the same A loading circuit capable of canceling a DC offset and a mixer using the same. The loading circuit includes a first current mirror unit and a second current mirror unit for respectively receiving a first input signal and a second input signal and generating a first sign... | 06/08/2006 |
| 20060114050 | Minimizing i/f noise configuration for zif mixer A Gilbert cell (Q3-Q8) of a mixer (11) controls a differential output voltage between a pair of output terminals (OUT1, OUT2) of the mixer (11). A polysilicon resistor (R7) of the mixer (11) applies a differential ... | 06/01/2006 |
| 20060082406 | CONSTRAINED COEFFICIENT ADAPTATION FOR CONTINUOUS-TIME EQUALIZERS A low-voltage constrained coefficient adaptation and multiplication is provided. To provide the constrained coefficient adaptation, an adder adds an adaptive differential control voltage to a forcing differential control voltage to provide an effective coefficient. The ... | 04/20/2006 |
| 20060066362 | Voltage-current conversion circuit, amplifier, mixer circuit, and mobile appliance using the circuit A cross-coupled low-distortion voltage-current conversion circuit has transistors T1 to T6. At least one of the transistors has parallel connections of two or more transistors. By arbitrarily setting the number of parallel connections of the transistors T<... | 03/30/2006 |
| 20060055445 | Multi-standard amplifier The present invention relates generally to amplifiers, and more specifically to multi-band and/or multi-standard low noise amplifiers. There are currently no inexpensive, highperformance, fully-integrable, multi-standard low noise amplifiers (LNAs) available. The invent... | 03/16/2006 |
