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7633344 |
Low noise amplifier and differential amplifier
In a double-loop negative feedback low noise amplifier having double negative feedback paths by a feedback transformer and a feedback resistor added to a cascode amplifier comprising transistors...
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7629851 |
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...
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7629853 |
Amplifying apparatus and bias stabilization circuit
An amplifying apparatus including an amplifier having a first FET, a second FET having a source connected to a drain of the first FET, a load resistance connected to a drain of the second FET, a...
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7619482 |
Compact low voltage low noise amplifier
An apparatus comprising a first stage and a second stage. The first stage generally comprises a first transistor configured as a common-emitter amplifier. The second stage generally comprises a...
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7598814 |
Method and apparatus for an LNA with high linearity and improved gain control
A low noise amplifier (LNA) circuit includes a linear input stage including a first circuit that generates an output current and has a low input impedance. A device receives an input signal,...
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7598813 |
Radio frequency amplifier with constant gain setting
Radio frequency amplifier with constant gain setting. A circuitry that includes triple well connected MOSFETs is employed to eliminate body effects therein. The voltage gain as presented herein,...
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7598810 |
Power amplifier having input ends combined in series and output ends combined in series
A power amplifier includes a first transformer, a first transistor, a first resistor, a second transformer, a second transistor, a second resistor, and a bias circuit. The first transformer drives...
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7592872 |
Differential amplifier with single ended output
Various embodiments for converting a differential signal to a single ended signal are disclosed. The embodiments comprise a transistor pair for receiving a differential signal; and a tank circuit...
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7589593 |
Amplifier circuit having stacked main amplifier and parallel sub-amplifier
An amplifier circuit for amplifying an input signal to generate an output signal is provided. The amplifier circuit has a stacked main amplifier, a parallel sub-amplifier, and a signal combiner....
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7586375 |
Active circuit having improved linearity using multiple gated transistor
The present invention relates to improved linearity of an active circuit, and more particularly, to an active circuit having improved linearity using a main circuit unit and an assistant circuit...
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7576613 |
Regulated cascode circuits and CMOS analog circuits including the same
A regulated cascode circuit includes a first MOS transistor of a first conductive type, a second MOS transistor of the first conductive type, a third MOS transistor of a second conductive type, a...
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7570119 |
Cascode-connected amplifier circuit, semiconductor integrated circuit using same, and receiving apparatus using same
A cascode-connected amplifier circuit including two transistors cascode-connected to each other, where a first transistor having a grounded emitter or a first field-effect transistor having a...
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7560994 |
Systems and methods for cascode switching power amplifiers
Example embodiments of the invention may provide systems and methods for a power amplifier. The systems and methods may include a first common-source device having a first source, a first gate, a...
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7555263 |
Adaptive radio transceiver
An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a...
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7551035 |
Fast converter for crossing voltage domains
A voltage domain crossing circuit and method are disclosed. In one embodiment, the voltage domain crossing circuit comprises an AC coupling component, a DC biasing component and a high voltage...
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7551036 |
Power amplifier for amplifying high-frequency (H.F.) signals
An H.F. power amplifier is disclosed having a plurality of branches ( 10, 11, 12 ) switched in parallel. Each branch comprises a plurality of amplifier elements (T 1 , T 4 ) switched in series....
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7545221 |
Signal amplifying apparatus including I/O devices and core devices
The present invention provides a signal amplifying apparatus, for converting a first input signal into a first output signal. The signal amplifying apparatus includes an input stage circuit for...
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7541876 |
Amplifier and method for operating the same
An amplifier includes an input terminal, an output terminal, a cascode circuit with a first and a second transistor serially coupled between an output terminal and a terminal of a predefined...
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7541875 |
High-linearity low noise amplifier and method
Embodiments of a high-linearity low-noise amplifier (LNA) and method are generally described herein. Other embodiments may be described and claimed. In some embodiments, an RF input signal may be...
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7511578 |
Stacked RF power amplifier
A method and apparatus provides techniques for electrically isolating switching devices in a stacked RF power amplifier, which prevents the switching devices from being subjected to high breakdown...
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7489200 |
Gain controllable low noise amplifier and wireless communication receiver having the same
A gain controllable wide-band low noise amplifier includes a first transistor coupled to an input node and an output node and amplifying an input signal to generate an output signal, a second...
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7489201 |
Millimeter-wave cascode amplifier gain boosting technique
Disclosed is a gain boosting technique for use with millimeter-wave cascode amplifiers. The exemplary technique may be implemented using a 0.18 μm SiGe process (F T =140 GHz). It has also been...
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7489187 |
Operational amplifier and related noise separation method thereof
An amplifier includes: an input stage for receiving an input signal to generate a first signal corresponding to a first band; a first modulator coupled to the input stage for modulating the first...
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7489202 |
RF amplifier with stacked transistors, transmitting device, and method therefor
An RF transmitting device ( 10 ) includes an RF amplifier ( 22 ) formed having components formed on a common semiconductor substrate ( 14 ). RF amplifier ( 22 ) includes MOS transistors ( 42 ) and...
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7482879 |
Variable gain amplifier and communication apparatus
A variable gain amplifier is provided that can obtain a wide range of gain variation and suppress the deterioration of linearity when switching between amplifying transistors. The variable gain...
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7479830 |
Differential amplifier using body-source cross coupling
Disclosed herein is a differential amplifier using body-source cross coupling. In a common gate differential amplifier in which common gate amplifiers are implemented in a differential structure,...
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7477106 |
Power amplifier with bias control
A power amplifier ( 100 ) suitable for use in mobile telecommunications equipment has a first stage ( 2 ) and an optional second stage ( 2 ), each stage being provided with a bias circuit ( 4, 5 )....
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7474155 |
Power amplifier
A power amplifier includes a front-stage amplifier including first and second transistors connected in parallel, and a rear-stage amplifier including a third transistor. The first transistor is...
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7474158 |
Dynamic match low noise amplifier with reduced current consumption in low gain mode
The present invention is a dual mode LNA that can operate in either normal mode or low-gain mode, which has been designed to maintain a constant input impedance when switching between the two modes...
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7468634 |
Apparatus for converting single-ended signal into differential signal
The present invention discloses a single-ended input/differential output amplifier includes a first bonding wire, a transduction gain circuit coupled to the first bonding wire for receiving an...
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7466206 |
Amplifier circuit
Amplifier circuit for amplifying an input signal, having a vertically integrated cascode that has a collector semiconductor region of a collector, adjacent to the collector semiconductor region, a...
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7463093 |
Variable gain amplifier
A variable gain amplifier includes multiple gain stages. Each gain stage includes a gain transistor and a cascode transistor to form a cascode amplifier, and a current diversion transistor to...
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7456691 |
Amplifier circuit with reduced temperature dependence of the gain
An amplifier circuit includes an amplifier input, an amplifier output, a control terminal for adjusting a gain of the amplifier circuit, and a feedback path between the amplifier output and the...
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7456689 |
Amplifier circuit and gain control method thereof
An amplifier circuit is provided with a control section that respectively selectively supplies either a second voltage or a third voltage to gates of a plurality of second transistors and gates of...
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7446613 |
Power amplifier input structure having a differential output
A method and apparatus provides an input structure for a power amplifier. In one example, the input structure has an input network and a predriver circuit to provide an input signal to the power...
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7446606 |
Methods and apparatus to provide slew enhancement for low power amplifiers
Methods and apparatus to provide increased current to a cascode amplifier to maximize slew rate are disclosed. The amplifier has a first input coupled to an input switch and a load circuit for...
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7443245 |
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...
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7432767 |
Tunable low noise amplifier
Tunable low noise amplifier using an RF current feed back loop (L) coupled between input (IM) and output (OM) means and including first (CAI) and second (CA 2 ) serially coupled first order lowpass...
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7427898 |
Detecting amplifier out-of-range conditions
Out-of-range conditions are detected in amplifier CMOS or BiCMOS circuitry that includes a control transistor (M S ) connected in series with a cascode transistor (M SC ), and a differential...
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7421254 |
High linearity, high efficiency power amplifier with DSP assisted linearity optimization
A communications transceiver includes a baseband processor, a receiver section, and a transmitter section that includes a power amplifier. The receiver and transmitter sections communicatively...
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7420420 |
FET bias circuit
The present invention discloses an FET (Field Effect Transistor) bias circuit comprising a current-changing information circuit having a power source, a resistor connected to the signal output end...
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7420425 |
Power amplifier and method thereof
A power amplifier amplifying an input signal to generate an output signal, comprising a cascode unit and a bias circuit. The cascode unit comprises a cascode stage, a first input stage, and a...
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7417575 |
High-bandwidth high-gain amplifier
A pipelined analog to digital converter comprises a first stage that receives an input voltage, that generates a first sampled digital value and a first residue voltage, and that includes a first...
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7414481 |
Receiver with colpitts differential oscillator, colpitts quadrature oscillator, and common-gate low noise amplifier
Embodiments of the present invention include a common-gate amplifier having an input terminal and an output terminal, a transistor having a source, a drain, and a gate, four inductors, and two...
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7411454 |
Electron turbulence damping circuit for a complimentary-symmetry amplification unit
An electron turbulence damping circuit ( 40 ) for a complimentary-symmetry unit ( 10 ′) includes a first output device ( 12 ′) having a first conductivity and a second output device ( 14 ′)...
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7400198 |
Active circuit having improved linearity using multiple gated transistor
The present invention relates to improved linearity of an active circuit, and more particularly, to an active circuit having improved linearity using a main circuit unit and an assistant circuit...
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7397309 |
Bias circuit for a wideband amplifier driven with low voltage
An amplifier includes a ground, first and second MOS transistors, a first resistive load and a supply voltage, which are connected in series in this order. A bias circuit provides first and second...
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7391269 |
Amplifying circuit
The invention provides an amplifying circuit for reducing electric power consumption at a standby mode time. Therefore, in DMOS and NMOS transistors constituting a cascode amplifier, the gate of...
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7378912 |
Cascode connection circuit
A cascode connection circuit includes a first field effect transistor (FET) which has a source terminal and a drain terminal, the source terminal being connected to ground; a second FET which has a...
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7378910 |
Power amplifier for a transmitter
A power amplifier for a transmitter includes a plurality of CMOS amplifiers of different types which are serially and alternately connected, and matching circuits for matching impedance...
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