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| Number | Title | Issue Date |
| 8159293 | Nested transimpendance amplifier A nested transimpedance amplifier circuit including a first power source, a second power source, a charge pump module and a transimpedance amplifier. The first power source is at a first voltage. The second power source is at a second voltage. The second voltage is ... | 04/17/2012 |
| 8004355 | Low dissipation amplifier A low dissipation, low distortion amplifier includes a driver amplifier stage and a main output stage, with a plurality of impedance networks providing, among other things, feedback paths from outputs of the driver and main output stages to the input of the driver s... | 08/23/2011 |
| 7986185 | Rail-to-rail Miller compensation method without feed forward path A rail-to-rail Miller compensation method without feed forward path includes forming a first compensation branch including a first amplifier, wherein an input of the first amplifier is electrically connected with an output of a second stage gain amplifier, the secon... | 07/26/2011 |
| 7978007 | Feedback network for cascaded amplifiers The invention relates to a feedback network (60) for cascade amplifiers (200), which comprises an active stage (30) to feed signal back to a first internal node (65) at the output of the first amplifier stage (61) of the cascade. T... | 07/12/2011 |
| 7948309 | DC-offset cancelled programmable gain array for low-voltage wireless LAN system and method using the same An amplifier circuit includes a transconductance amplifier at an input side of the amplifier circuit, a transimpedance amplifier connected to an output of the transconductance amplifier, and a voltage amplifier connected to an output of the transimpedance amplifier.... | 05/24/2011 |
| 7821335 | Semiconductor integrated circuit with variable gain amplifier The variable gain amplifier includes a bias circuit (BC) 1, a matching circuit (MC) 2, a variable gain resistive feedback amplifier (FA) 3 and an output follower (EA) 4. The resistance values of the load resistance Rc and feedback resista... | 10/26/2010 |
| 7808311 | Nested transimpedance amplifier A nested transimpedance amplifier circuit includes a first-order nested transimpedance amplifier having an input and an output. The first-order nested transimpedance amplifier is configured to be powered by a first voltage. A charge pump module is configured to rece... | 10/05/2010 |
| 7791411 | Amplifier arrangement and method for amplifying a signal An amplifier arrangement and a method for amplifying a signal, the arrangement including a transistor to amplify an input signal and to provide an intermediate signal. The intermediate signal is amplified to form an output signal which is fed back to the transistor.... | 09/07/2010 |
| 7737777 | Amplifiers with compensation An amplifier system includes a first amplifier stage having an input and an output. A second amplifier stage has an input and an output, the input of the second amplifier stage being connected to the output of the first amplifier stage. A transistor has a control te... | 06/15/2010 |
| 7633338 | Compensation circuit for amplifiers having multiple stages An amplifier circuit comprises a first capacitance having one end that communicates with an input of a first amplifier stage. An amplifier has a first gain, an input that communicates with an opposite end of the first capacitance, and an output. A second capacitance... | 12/15/2009 |
| 7626453 | Nested transimpedance amplifier A nested transimpedance amplifier (TIA) circuit comprises a zero-order TIA having an input and an output. A first operational amplifier (opamp) has an output and an input that communicates with said output of said zero-order TIA. A first power supply input applies a... | 12/01/2009 |
| 7616057 | Nested transimpedance amplifier A differential transimpedance amplifier circuit comprises a first operational amplifier having a first inverting input, a first non-inverting input, a first inverting output and a first non-inverting output. A second operational amplifier has a second inverting inpu... | 11/10/2009 |
| 7605649 | Nested transimpedance amplifier A transimpedance amplifier comprises a first operational amplifier having an input and an output. A second operational amplifier has an input and an output that communicates with the input of the first operational amplifier. A first feedback element has one end that... | 10/20/2009 |
| 7602240 | Power amplifier with an output matching network Provided herein is a power amplifier having a multiple stage power amplifier section and an output matching network section. The multiple stage power amplifier section can include multiple power amplifier stages with interstage matching circuits located therebetween... | 10/13/2009 |
| 7551024 | Nested transimpedance amplifier A nested transimpedance amplifier (TIA) circuit includes a zero-order TIA having an input and an output, and a first operational amplifier (opamp). The opamp includes an input that communicates with said output of said zero-order TIA, a first transistor driven by sa... | 06/23/2009 |
| 7518447 | Transimpedance amplifier A transimpedance amplifier (TIA) circuit comprises an input and an amplifying stage that includes N amplifiers, that generates a first signal and that is AC coupled to the input. A bias stage generates a second signal and that is DC coupled to the input. An output s... | 04/14/2009 |
| 7459972 | Amplifiers with compensation An amplifier system includes a first amplifier, a second amplifier, a first capacitance, and a first transistor. The first amplifier has an input and an output. The second amplifier has an input that communicates with the output of the first amplifier. The first cap... | 12/02/2008 |
| 7425865 | Differential cascode amplifier A differential cascode amplifier is disclosed that includes in each branch two transistors connected to form a cascode circuit, and has a cross-compensation (neutralization) with at least one pair of capacitors for compensating a parasitic capacitance of a transisto... | 09/16/2008 |
| 7423487 | Variable gain feedback amplifier circuit apparatus and method therefor A variable gain feedback amplifier circuit comprising a degenerated common emitter circuit coupled to an emitter follower circuit, an output of the emitter follower circuit being coupled to an input of the degenerated common emitter circuit via a variable feedback i... | 09/09/2008 |
| 7405616 | Nested transimpendance amplifier A differential transimpedance amplifier circuit comprises first, second, third and fourth operational amplifiers having a first inverting input, a first non-inverting input, a first inverting output and a first non-inverting output. A first feedback element communic... | 07/29/2008 |
| 7403067 | Compensation circuit for amplifiers having multiple stages An amplifier circuit comprises a first capacitance having one end that communicates with an input of a first amplifier stage. An amplifier has a first gain, an input that communicates with an opposite end of the first capacitance, and an output. A second capacitance... | 07/22/2008 |
| 7348846 | Amplifier arrangement The present invention relates to an amplifier arrangement having a plurality of amplifier stages that form a series circuit. Each amplifier stage comprises a current mirror, the translation ratio of which defines the gain of the amplifier stage. Moreover, a current ... | 03/25/2008 |
| 7323939 | Low noise amplifier for wideband tunable matching Provided is a low noise amplifier with a common source and a source degeneration, which has linearity, power gain, noise factor, and lossless input matching. The low noise amplifier includes: a first inductor having one terminal connected to an input terminal receiv... | 01/29/2008 |
| 7304536 | Nested transimpendance amplifier A nested transimpedance amplifier (TIA) circuit includes a zero-order TIA having an input and an output. A first operational amplifier (opamp) has an input that communicates with the output of the zero-order TIA and an output. A first feedback resistor has one end t... | 12/04/2007 |
| 7292097 | Amplifier and method for processing signals In some embodiments, an apparatus includes an amplifier circuit and a bias circuit coupled to the amplifier. The amplifier circuit includes an input port and an output port, an input port circuit element coupled to the input port, an output port circuit element coup... | 11/06/2007 |
| 7283840 | Reconfigurable analog baseband for a single-chip dual-mode transceiver A dual-mode analog baseband circuit is implementable on a single IC with reduced chip area. The baseband portion of the IC includes a single dual-mode complex filter that is reconfigurable to be a filter for Bluetooth signals or for wireless local area network (wire... | 10/16/2007 |
| 7279985 | Regulated cascode amplifier with small-sized feed-back amplifier A regulated cascode amplifier includes a main cascode amplifier and a feed-back amplifier. The main cascode amplifier has an input transistor coupled in a stack with an output transistor at an input control node. The feed-back amplifier including a plurality of tran... | 10/09/2007 |
| 7276965 | Nested transimpedance amplifier A nested transimpedance amplifier (TIA) circuit includes a zero-order TIA having an input and an output. A first operational amplifier (opamp) has an input that communicates with the output of the zero-order TIA and an output. A first feedback resistance has one end... | 10/02/2007 |
| 7276969 | Multi-amplifier circuit A transimpedance amplifier circuit includes a first amplifier with an input, an output and a first transconductance. A second amplifier has an input that communicates with the output of the first amplifier, an output and a second transconductance. A first resistance... | 10/02/2007 |
| 7265631 | Transimpedance amplifier with signal amplification circuit that performs power signal regulation The transimpedance amplifier that performs signal amplification includes a first input that receives an input signal, a second input that receives a power signal, a third input that receives a control signal, and an output that generates an output signal. The transi... | 09/04/2007 |
| 7233199 | Circuit and method of establishing DC bias levels in an RF power amplifier A method and apparatus is used to provide DC stabilization and noise reduction in a multistage power amplifier. The invention uses various feedback techniques to stabilize DC levels, which helps to reduce noise. The invention also uses other techniques to reduce noi... | 06/19/2007 |
| 7224214 | Integrated circuit An integrated circuit includes a first and a second amplifier circuit each driven by an input signal. The first and second amplifier circuits generate a first and a second control signal on the output side. The control signals are generated independently of one anot... | 05/29/2007 |
| 7221218 | MOSFET amplifier having feedback controlled transconductance A signal is applied to the body of a MOSFET to enhance the transconductance of the MOSFET. The signal applied to the body of the MOSFET has essentially the same waveform as an input signal supplied to the gate of the MOSFET, and is shifted by approximately 180 degre... | 05/22/2007 |
| 7221217 | Self-bias and digitally tunable conduction angle circuits for a differential RF non-linear power amplifier employing low-voltage transistors A differential RF non-linear power amplifier employing low-voltage transistors in a cascode configuration uses self-biasing solutions rather than external biasing techniques to overcome transistor breakdown problems. The self-biasing solution ensures that the cascod... | 05/22/2007 |
| 7212070 | Circuit and method of reducing noise in an RF power amplifier A method and apparatus is used to provide DC stabilization and noise reduction in a multistage power amplifier. The invention uses various feedback techniques to stabilize DC levels, which helps to reduce noise. The invention also uses other techniques to reduce noi... | 05/01/2007 |
| 7205840 | Wideband CMOS gain stage A CMOS gain stage includes biasing circuitry configured to insure saturation of a subsequent stage without a source follower circuit. The CMOS gain stage is optionally powered by a supply voltage that is greater than a permitted supply voltage for a processes techno... | 04/17/2007 |
| 7202733 | Transconductance amplifiers with compensation An amplifier circuit comprises a first operational transconductance amplifier (OTA) has an input that communicates with the output of the first amplifier. A third amplifier has an input that communicates with the input of the first amplifier and an output. A fourth ... | 04/10/2007 |
| 7199655 | Multistage amplifier circuit without interstage coupling capacitor An input-stage amplifier (10) operating on a supply voltage (Vdd) and an output-stage amplifier (20) operating on a supply voltage (Vamp) are supplied at the non-inverting input with half the supply voltage as a reference voltage Vref. This allows the ... | 04/03/2007 |
| 7196579 | Gain-controlled amplifier, receiver circuit and radio communication device A gain-controlled amplifier capable of dealing with the system for performing the receiving operation continuously, and capable of correcting a change of a DC offset owing to an operation condition such as temperature; a receiver circuit using the gain-controlled am... | 03/27/2007 |
| 7190218 | Differential or single-ended amplifier and relative control method The method controls, in a feedback mode, a common collector or common drain amplifier, biased with a voltage applied on a bias node produced by a biasing circuit that generates a temperature compensated reference voltage from which the bias voltage applied on the bi... | 03/13/2007 |
