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7633337 |
Feedback-type variable gain amplifier and method of controlling the same
A feedback-type variable gain amplifier including a first field effect transistor, a feedback circuit, and a load circuit. The first field effect transistor receives an input voltage signal through...
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7605659 |
Gain adjustment for programmable gain amplifiers
A programmable gain amplifier (PGA) circuit includes a gain adjust circuit and a gain select circuit that are both coupled to an output of an amplifier. The gain select circuit completes feedback...
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7602239 |
Variable gain amplifier circuits
A variable gain amplifier circuit has an amplifier, a string of resistors, a plurality of gain switches, a current source, and at least two current switches. A first input terminal of the amplifier...
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7595693 |
System and method for providing a configurable inductor less multi-stage low-noise amplifier
In accordance with a particular embodiment of the present invention, an apparatus is offered that includes a configurable feedback low noise amplifier (LNA) connected to a common source connected...
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7564310 |
Amplifier for improving electrostatic discharge characteristic
An amplifier for improving an electrostatic discharge (ESD) characteristic includes an operational amplifier, a first resistor circuit, a first fuse box, a second resistor circuit, and a second...
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7554393 |
Signal amplifier
A signal amplifier includes a discrete-variable-gain amplifying unit, a gain of which takes a discrete value and changes stepwise, a linear-variable-gain amplifying unit connected in series to the...
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7545210 |
Gain adjustment for programmable gain amplifiers
A programmable gain amplifier (PGA) circuit includes a gain adjust circuit and a gain select circuit that are both coupled to an output of an amplifier. The gain select circuit completes feedback...
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7538604 |
Amplifier feedback switch configuration with improved PSRR
A circuit including a first sensitive node, a first component connected between the first sensitive node and a first terminal of a first switch, said first switch controlled by a first control...
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7515882 |
Apparatus, methods and articles of manufacture for a multi-band switch
The invention is directed to a multi-band switch having a transmitter switching section with a plurality of transmission ports, and a receiver switching section with a plurality of receiver ports,...
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7504880 |
Amplifier circuit
An amplifier circuit that is less likely to cause an error in a gain and a DC offset voltage and is suitable for reducing a size and power consumption is offered. A first resistor and a second...
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7495514 |
Low noise amplifier
A low noise amplifier including a first-stage signal amplifier, a second-stage signal amplifier and a gain control unit is disclosed. The first-stage signal amplifier is for receiving an input...
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7423481 |
Amplifier arrangement and amplifying method
In one embodiment, an amplifier arrangement includes an amplifier having a first input, a second input and an output, a first resistor network, having a first parallel circuit formed by a first...
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7423482 |
Circuit configuration having a feedback operational amplifier
The present invention relates to a circuit configuration ( 10 ) having a feedback operational amplifier (AMP) for amplifying an input signal (Vin) input into the circuit arrangement ( 10 ) and...
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7417499 |
Gain controlled amplifier and cascoded gain controlled amplifier based on the same
A gain controlled amplifier and a cascoded gain controlled amplifier based on the same are disclosed. The gain controlled amplifier includes an operational amplifier for amplifying an input signal,...
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7417500 |
Control of an adjustable gain amplifier
A method of controlling an adjustable gain of an amplifier is disclosed. The method includes setting an output of a replica amplifier to be equivalent to a precision reference with a control loop,...
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7414476 |
Sensor interface circuitry having adjustable gain and Q, and method for adjusting sensor interface circuitry gain and Q
A sensor interface filter having adjustable gain and Q is provided. The sensor interface includes a first operational amplifier coupled to gain circuitry, a gain stage, and a resistor. The gain...
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7391260 |
Variable gain amplifier and variable gain amplifier module
An analog variable gain amplifier (VGA) adjusting a signal level of a mobile communication system is provided. More particularly, design of a VGA using an operational transconductance amplifier...
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7388428 |
Power amplifier with controllable feedback loop
The present invention relates to a power amplifier for amplifying an electronic input signal ( 51 ) and a multi-band capable frontend with such power amplifier. The power amplifier comprises an...
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7375584 |
Gain adjustment method, gain adjustment circuit, and optical disc device having same gain adjustment circuit
A gain adjustment circuit includes a gain varying device for varying the gain of an input signal; and a detection device for detecting a variable output signal of the gain varying device, wherein...
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7372329 |
Method and apparatus to remove the DC component of a feedback signal
A feedback circuit disposed across input and output terminals of an amplifier is adapted so as not inject DC current back into the input terminal of the amplifier. The feedback circuit includes, in...
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7358818 |
Optical receiver for an optical communication
The present invention provides an optical receiver operable for optical signals each having different transmission speed. The optical receiver includes a light-receiving device, a pre-amplifier, a...
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7352242 |
Programmable gain trim circuit
A programmable gain amplifier includes a first gain setting circuit and a second gain setting circuit that are both coupled to an output of an amplifier. A trim adjustment circuit is and arranged...
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7352238 |
dB-linear analog variable gain amplifier (VGA) realization system and method
A dB-linear variable gain amplifier, a method for creation, and a system includes an amplifier; a pair of resistor arrays operatively connected to the amplifier, wherein each resistor array...
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7345546 |
Amplifier circuit and input circuit
A disclosed amplifier circuit is capable of changing a gain to amplify an input signal according to a control signal. The amplifier circuit comprises a differential amplifier circuit adapted to...
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7332963 |
Low noise amplifier
A low noise amplifier is provided that includes a first circuit block capable of amplifying a first voltage signal that is input to the amplifier. The first circuit block includes a first terminal...
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7327190 |
Differential amplifier arrangement
Circuitry for use in a differential amplifier includes an input stage having a first differential amplifier and an offset compensation stage that includes at least one controllable current source....
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7323931 |
System and method for operating a feedback network
A method and apparatus are provided for operating a feedback network ( 300, 400 ). The method and apparatus operate to combine ( 240 ) a feedback signal (I F ) and an incoming signal (V IN ) to...
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7323938 |
Amplifier circuit and light receiving apparatus
An amplifier 11 to which transistors 13 and 14 functioning as variable resistors are connected in parallel is used. A burst signal is received by a light receiving element 10 and the...
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7279969 |
Signal amplification method and amplifier array
An amplifier array includes a servo amplifier, which has a reference signal input, a return signal input, and an output signal connection, which supplies an output signal path, a reference signal...
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7279977 |
Integrated circuit with resistive network having reduced mismatch
An integrated circuit includes a resistive circuit with reduced mismatch that includes a primary resistive network with several main resistances (Rp) each having the same theoretical main value. It...
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7268628 |
Preamplifier
A preamplifier includes a negative-feedback amplifier circuit that converts a current signal from a photodetector into a voltage signal; and a conversion-gain control circuit that simultaneously...
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7265616 |
Charge amplifier
In a charge amplifier, an operational amplifier is provided. The operational amplifier has an inverting input terminal, a non-inverting input terminal, and an output terminal. An adjustable...
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7262655 |
High bandwidth resistor
A transimpedance amplifier is provided which includes a feedback path. The feedback path includes a feedback resistor and a voltage generator. The feedback resistor has a parasitic capacitance...
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7256648 |
Variable feedback circuits and methods
In one embodiment, the present invention includes a circuit comprising an amplifier having an input terminal, an output terminal, a positive supply voltage, and a negative supply voltage. The...
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7248107 |
Method of controlling a variable gain amplifier and electronic circuit
The present invention relates to a method of controlling a variable gain amplifier having at least one semiconductor switch, the amplifier having a first gain when the semiconductor switch is in a...
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7245179 |
Auto gain controller
A gain-controlled transimpedance amplifier circuit that comprises a first gain unit including an input for receiving a first current and an output, a current source for providing a second current,...
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7245890 |
High frequency variable gain amplification device, control device, high frequency variable gain frequency-conversion device, and communication device
A high frequency variable gain amplification device 100 includes: a feedback circuit 103 capable of changing a feedback impedance to adjust the gain of an amplifier 101 in accordance with a...
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7209004 |
DB-linear variable gain amplifier (VGA) stage with a high broad band
The invention relates to a VGA stage having a novel circuit configuration for amplifying/attenuating a differential input signal which is transmitted via a transmission line (H). The VGA stage...
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7205845 |
Amplifier circuit for converting the current signal from an optical receiving element into a voltage signal
An amplifier circuit for converting the current signal from an optical receiving element into a voltage signal. The amplifier circuit includes a transimpedance amplifier having a differential...
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7196577 |
Amplifier with capacitor selection
A selectable-gain amplifier selectively couples different capacitors and feedback networks to a gain stage to provide operating characteristics that may include constant bandwidth operation. An...
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7180366 |
Data signal amplifier and processor with multiple signal gains for increased dynamic signal range
Data signal amplification and processing circuitry with multiple signal gains for increasing dynamic signal range. An incoming data signal is processed in accordance with multiple signal gains. The...
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7180374 |
Photodiode integrated circuit having multiple gain states
Disclosed herein is a PhotoDiode Integrated Circuit (PDIC) having multiple gain states. The PDIC includes a current-voltage conversion unit, an input amplification stage circuit, a reference...
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7173487 |
Power amplification circuit and communication device using the same
A power amplification circuit, and a communication device using the same, which are capable of suppressing gain decreases of a power amplifier due to increases in input signal power in a state near...
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7164313 |
Method and apparatus for opening a feedback loop
Circuits, methods, and systems are provided for opening a primary feedback loop in a transmitter. An auxiliary feedback loop can be closed when the primary feedback loop is opened, and a controller...
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7135376 |
Resistance dividing circuit and manufacturing method thereof
A resistance dividing circuit including silicide layers respectively formed only on branch portions of a linear polysilicon resistance wiring having the branch portions. Contact plugs are connected...
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7132893 |
Selectable gain amplifier
A selectable gain amplifier in a standard integrated circuit package configuration comprises an amplifier having an analog input, an output and a control input for selecting one of two or three...
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7123098 |
Transimpedance amplifier with differential peak detector
A method and apparatus to provide automatic gain control and offset correction in a transimpedance amplifier.
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7068107 |
Variable gain amplifier
The variable gain amplifier of the present invention includes at least an operation amplifier. By choosing one of output stages, a feedback resistor is selected and the gain of the variable gain...
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7057454 |
Resistor and switch-minimized variable analog gain circuit
A DSM variable high-gain circuit includes a differential amplifier and a negative feedback loop comprising low resistance poly resistors and switches configured in a T-structure having a junction...
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7054372 |
Digital transmission line tap circuit
A digital transmission line tap circuit is provided for applying a non-intrusive tap on a digital transmission line thus allowing the transmission signal to be monitored or utilized by another...
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