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| Number | Title | Issue Date |
| 8149056 | Amplifying circuit An amplifier having an output stage with a complementary pair of first and second transistors each coupled to an output node of the amplifier; control circuitry arranged to provide a control signal at a control node of the first transistor based on the voltage at an... | 04/03/2012 |
| 7936217 | High-linearity complementary amplifier A complementary amplifier includes an NMOS transistor coupled to a PMOS transistor in a stacked configuration. The NMOS transistor and the PMOS transistor receive and amplify an input signal. The NMOS and PMOS transistors operate as a linear complementary amplifier ... | 05/03/2011 |
| 7920027 | Amplifier design with biasing and power control aspects Techniques for biasing an amplifier using a replica circuit are disclosed. In an embodiment, a replica circuit having substantially the same topology and sizing as a push-pull amplifier circuit is coupled to a main push-pull amplifier circuit. A transistor in the re... | 04/05/2011 |
| 7889007 | Differential amplifier with active post-distortion linearization A differential amplifier, which has good linearity and noise performance, includes a first side that includes first, second, third, and fourth transistors and an inductor. The first and second transistors are coupled as a first cascode pair, and the third and fourth... | 02/15/2011 |
| 7843265 | Methods and apparatus to reduce idle current in power amplifiers Power amplifiers with reduced idle currents are described. In some examples, a power amplifier includes a driver configured to generate a control signal based on an input signal. The power amplifier also includes a first output transistor configured to selectively p... | 11/30/2010 |
| 7821340 | Output stage circuit and operational amplifier An output stage circuit is disclosed, which includes a first PMOS transistor, a second PMOS transistor, a first NMOS transistor, and a second NMOS transistor. By using twin-well CMOS transistors and a specific circuit configuration, the invention supports a HALF AVD... | 10/26/2010 |
| 7795977 | Bootstrapped class AB CMOS output stage A bootstrapped class AB CMOS output circuit and method for generating a class AB output are disclosed. The bootstrapped class AB CMOS output circuit has a voltage offset circuit coupled to an NMOS transistor and a PMOS transistor. The voltage offset circuit has a ca... | 09/14/2010 |
| 7764123 | Rail to rail buffer amplifier A buffer amplifier having a wide output voltage range includes a first source follower circuit having a first current source and a first transistor, and a second source follower circuit having a second current source and a second transistor. The first source followe... | 07/27/2010 |
| 7737784 | Self configuring output stages of precision amplifiers Self configuring output stages of precision amplifiers that remain linear when operating into a load that may have a ground reference below the amplifier ground reference, that maintain full amplifier gain while approaching zero output, and that can provide a zero o... | 06/15/2010 |
| 7710200 | Output buffer and power amplifier comprising thereof The present invention relates an output buffer and a power amplifier having the same. The output buffer includes a push-pull circuit unit, an output unit, and a driver. The push-pull circuit unit includes transistors connected to each others in a push-pull formation... | 05/04/2010 |
| 7570116 | Output stage An output stage, comprising a first transistor operable to pull a voltage at an output node towards a first voltage, and a rechargeable energy store having a potential difference between first and second terminals wherein the rechargeable energy store is arranged to... | 08/04/2009 |
| 7477104 | Power amplifier circuit and test apparatus Power amplifier circuit outputs an output voltage corresponding to an input voltage supplied, and includes positive and negative-side output units including a positive or negative-side output resistor and a positive or negative-side transistor having its source term... | 01/13/2009 |
| 7471151 | Circuits for quiescent current control A circuit capable of quiescent current control, the circuit comprising a first operational transconductance amplifier (OTA) including a first output terminal, a first transistor including a first gate coupled to the first output terminal of the first OTA, a second O... | 12/30/2008 |
| 7466201 | Class AB output stage and method for providing wide supply voltage range A class AB output stage includes first (MP) and a second (MN) output transistors having sources coupled to first (VDD) and second reference voltages, respectively, drains coupled to an output (13), and gates coupled to first (... | 12/16/2008 |
| 7411455 | High output current buffer A bipolar high output current buffer is disclosed using a negative feedback current mirror to supply the base drive to an output transistor. Small quiescent currents are used wherein the buffer demonstrates low quiescent power dissipation. The current mirror supplie... | 08/12/2008 |
| 7405624 | Class AB source follower Various source follower circuits and methods for implementing such are disclosed. As one example, a class AB source follower circuit is disclosed that includes a source follower circuit that is actively biased. The dynamic biasing allows the source follower circuit ... | 07/29/2008 |
| 7368992 | Load-invariant amplifier A push-pull amplifier having low output impedance and low crossover distortion is provided. A least one of a current through a sourcing current path of an output stage and a current through a sinking current path of the output stage is determinative of a quiescent c... | 05/06/2008 |
| 7365603 | FET amplifier, pulse modulation module, and radar device An FET amplifier includes an FET for amplifying a high-frequency signal to be input to the gate on the basis of a gate bias voltage from a gate bias control circuit. In the FET amplifier, a high-frequency signal input circuit and the output portion of an inverting a... | 04/29/2008 |
| 7362175 | Low-consumption voltage amplifier A low consumption voltage amplifier including a transistor, a first current generator that supplies power to the drain of the transistor, a second current generator that charges the source of the transistor, the current output by the second current generator being s... | 04/22/2008 |
| 7352243 | Voltage comparator circuit A voltage comparator that realizes high-speed operation with a simple structure includes an input differential stage having a first differential pair and a second differential pair, into which a differential voltage is inputted from differential input terminals In | 04/01/2008 |
| 7352247 | Triple cascode power amplifier of inner parallel configuration with dynamic gate bias technique Provided is a power amplifier which fits to a deep-submicron technology in radio frequency wireless communication. The power amplifier includes a cascode including a first transistor which receives and amplifies an input signal, and a second transistor which is conn... | 04/01/2008 |
| 7339427 | Analogue power control in a saturated amplifier A circuit is disclosed having a first series circuit path including a first switching transistor, a cascode transistor disposed in cascode arrangement with the first switching transistor, a transformer, and a fourth switching transistor. The circuit also has a secon... | 03/04/2008 |
| 7336127 | Doherty amplifier configuration for a collector controlled power amplifier An efficient power amplifier circuitry for a mobile terminal or similar wireless communication device is provided. The power amplifier circuitry includes an output stage configured as a collector controlled Doherty amplifier, wherein the collector controlled Doherty... | 02/26/2008 |
| 7330071 | High efficiency radio frequency power amplifier having an extended dynamic range A system and method are provided for efficiently amplifying a radio frequency signal. In general, the system includes power amplifier circuitry that efficiently amplifies an input signal under power back-off conditions. In one embodiment, the power amplifier circuit... | 02/12/2008 |
| 7327194 | Low voltage low power class A/B output stage A CMOS class A/B output stage provides the advantages of high speed operation, low supply voltage requirements, and low quiescent current draw, resulting from the use of subthreshold biasing of the output driver transistors. The architecture of the output stage make... | 02/05/2008 |
| 7315212 | Circuits and methods for implementing transformer-coupled amplifiers at millimeter wave frequencies Circuits and methods are provided for building integrated transformer-coupled amplifiers with on-chip transformers that are designed to resonate or otherwise tune parasitic capacitances to achieve frequency tuning of amplifiers at millimeter wave operating frequenci... | 01/01/2008 |
| 7304539 | High frequency power amplifier circuit and electronic component for high frequency power amplifier In a high frequency power amplifier circuit that supplies a bias to an amplifying FET by a current mirror method, scattering of a threshold voltage Vth due to the scattering of the channel impurity concentration of the FET, and a shift of a bias point caused by the ... | 12/04/2007 |
| 7304538 | Accurate quiescent current control scheme in floating controlled class AB amplifier Provided is an amplifier including a system for controlling output stage quiescent current. The amplifier includes a driving stage including first pmos and nmos transistors coupled together, and an output stage connected to the driving stage. The output stage includ... | 12/04/2007 |
| 7301399 | Class AB CMOS output circuit equipped with CMOS circuit operating by predetermined operating current In a class AB CMOS output circuit provided with a CMOS circuit including first P and N channel transistors and operating by a predetermined operating current Io, a replica circuit is formed on a semiconductor substrate of the CMOS circuit, and includes a ... | 11/27/2007 |
| 7295069 | Differential amplifier circuit capable of reducing current consumption An integrated circuit device includes a differential amplifier, an output driver and a control circuit. The differential amplifier is responsive to a pair of differential input signals and may include a pull-down current source responsive to a pair of bias signals. ... | 11/13/2007 |
| 7292073 | Transmission line driver circuit A transmission line driver circuit that operates at a first voltage level is fabricated using devices that operate at a second, lower voltage level. The driver circuit includes a ramp generator that receives a speed signal and a data signal and generates a charge ra... | 11/06/2007 |
| 7276940 | Buffer/voltage-mirror arrangements for sensitive node voltage connections The present invention is directed to buffer/voltage mirror arrangement for sensitive node voltage connections. ... | 10/02/2007 |
| 7276976 | Triple cascode power amplifier of inner parallel configuration with dynamic gate bias technique Provided is a power amplifier which fits to a deep-submicron technology in radio frequency wireless communication. The power amplifier includes a cascode including a first transistor which receives and amplifies an input signal, and a second transistor which is conn... | 10/02/2007 |
| 7274050 | Packaging and manufacturing of an integrated circuit Apparatus, packaging, and methods of manufacture of an integrated circuit are provided. The integrated circuit includes a component of a first type fabricated on a first substrate containing a first material, and a component of a second type fabricated on a second s... | 09/25/2007 |
| 7271630 | Push-pull buffer amplifier and source driver A push-pull buffer amplifier and a source driver are provided. In the buffer amplifier, the N-type and the P-type comparators compare an input signal and an output signal. The input terminals of the first and the second inverters are coupled to the first output term... | 09/18/2007 |
| 7270640 | Massage device utilizing an unanchored magnet for primary force generation A therapeutic system for massage comprises a massage device having an activation cell comprising a hollow pocket at least partially filled with a ferro-magnetic fluid, a permanent magnet suspended in the ferro-magnetic fluid, a coil of electrically-conductive materi... | 09/18/2007 |
| 7256651 | System and method for providing a constant swing high-gain complementary differential limiting amplifier A system and a method are disclosed for providing a constant swing high-gain complementary differential limiting amplifier. High gain for the differential amplifier is created by providing a current to the driving transistors that is a combination of any of (a) cons... | 08/14/2007 |
| 7253680 | Amplifier system with current-mode servo feedback A system and method for compensating an amplifier apparatus for low frequency and/or DC components of an externally applied input signal as well as for any voltage offsets contributed by the amplifier circuitry. Band-limited servo feedback is applied to predetermine... | 08/07/2007 |
| 7248104 | Operational amplifier An operational amplifier includes a current provider that introduces an additional current Ic to an internal node A of the operational amplifier for reducing the output offset voltage of the operational amplifier. ... | 07/24/2007 |
| 7242250 | Power amplifier A power amplifier includes an input circuit, three power supply lines with voltages successively decreasing in an order of first, second and third power supply lines, a push-side driving circuit and a pull-side driving circuit which receive control signals from the ... | 07/10/2007 |
