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7636004 |
High-frequency switching device and semiconductor
The first terminals of a plurality of resistor elements are connected to the intermediate connection points of a plurality of FETs connected in series, and a voltage, having a phase opposite to...
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7626474 |
Compensated attenuator circuit and oscilloscope utilizing the same
An attenuator circuit. The attenuator circuit includes a resistive divider coupled to a capacitive network including first and second capacitive dividers. The resistive divider is configured to...
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7609126 |
Diode switch and attenuator for reducing a bias current
Diodes and are connected between an input terminal and an output terminal. These diodes are connected in parallel, and the cathode of a latter-stage diode is connected to the anode of a...
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7609116 |
Integrated amplifier arrangement
A millimetric-wave amplifier arrangement comprises a first amplifier whose output is connected to one input of the second amplifier via an adjustable attenuator. Both amplifiers are integrated on a...
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7595705 |
Attenuator and step attenuation device having the same
An attenuator for attenuating an input signal at a predetermined rate and a step attenuation device having the same are provided. The attenuator includes first to sixth impedance components. A...
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7567122 |
Variable gain amplifiers systems and methods
A system for controlling gain in a polar loop is disclosed. Embodiments of the invention provide for a substantially constant gain tolerant of changes in supply voltage, ambient temperature, and/or...
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7546101 |
Variable attenuation of broadband differential signals using PIN diodes
Disclosed herein is a system for the variable attenuation of broadband differential signals. An exemplary system of variable attenuation of broadband differential signals includes attenuation...
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7528677 |
Temperature compensation attenuator
A temperature compensation attenuator comprises a base, a serial film thermistor and a parallel film resistor on the base, an input terminal and an output terminal which are connected to the serial...
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7525395 |
Step attenuator
There is provided a step attenuator having two Pi-type attenuators and one bridged-T type attenuator that share some resistors. The step attenuator is used to prevent a reduction in frequency range...
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7521980 |
Process and temperature-independent voltage controlled attenuator and method
A circuit includes a first variable resistor having a resistance which is variable in response to a resistance control signal. A resistance control circuit includes a first current source circuit...
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7505748 |
Linear voltage controlled variable attenuator with linear DB/V gain slope
A variable attenuator and method of attenuating a signal is presented. The variable attenuator contains an input that receives an input signal to be attenuated. A voltage divider between a resistor...
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7492236 |
Gain compensation circuit
A gain compensation circuit, applied to a microwave transceiver, includes a gain adjuster, a first attenuator and a second attenuator. The gain adjuster is disposed between a first amplifier and a...
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7492237 |
Gain compensation circuit
A gain compensation circuit comprises a first amplifier, a second amplifier, a filter, a first attenuator, a second attenuator and a third attenuator. The first amplifier is configured to amplify...
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7482891 |
Interpolating programmable gain attenuator
A programmable gain attenuator includes a termination resistor. A first termination switch connects one side of the termination resistor to a first output. A second termination switch connects...
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7479843 |
Radiofrequency attenuator and method
Radiofrequency attenuator and method. The attenuator includes a pair of transparent windows. A chamber between the windows is filled with molten salt. Preferred molten salts include quarternary...
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7477085 |
Digital attenuator circuits and methods for use thereof
An attenuator system includes a first adjustable impedance component on a first current path between a input component and a output component, and a second adjustable impedance component between...
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7474170 |
Attenuator
A linearizer includes fifth diodes, a third resistor, sixth diodes, and a first npn heterojunction bipolar transistor. When a low-level voltage is applied to first and fourth control voltage...
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7453307 |
Process independent voltage controlled logarithmic attenuator having a low distortion and method therefor
A process independent voltage controlled logarithmic attenuator has an attenuator control stage block having a first input coupled to a controlled input and a second input coupled to an offset...
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7449976 |
Power efficient PIN attenuator drive circuit
An attenuator circuit ( 10 ) having two or more branch circuits ( 12 a to 12 e ) has inputs ( 14 a to 14 e ) for the branch circuits ( 12 a to 12 e ) being connected essentially in parallel...
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7423514 |
Constant-power constant-temperature resistive network
A thermally stabilized device is described. Single or multiple input ports are accommodated and single and multiple power ports are described. The variation of resistance of a resistor subject to...
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7417462 |
Variable external interface circuitry on programmable logic device integrated circuits
A programmable logic device (“PLD”) includes circuitry for optionally and variably modifying characteristics of an input signal in any of several respects. Examples of such modifications...
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7408396 |
High voltage protection circuit
Disclosed is a circuit to provide protection from an over voltage signal. The circuit protects against load dumps or positive transients applied to any electronic unit. The circuit isolates the...
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7394994 |
Optical receiver circuit
An optical receiver circuit comprising an optical converter circuit ( 38 ), comprising a photodiode and converting optical power into electrical power, a sensor circuit for deriving a control...
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7391268 |
Power amplifying device comprising a stabilizing circuit
A power amplifying device includes a stabilizing circuit between an input terminal and an amplifier. The stabilizing circuit has a first line, a second line, and a third line. The first line is...
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7378895 |
On-chip electrically alterable resistor
A programmable, electrically alterable (EA) resistor, an integrated circuit (IC) chip including the EA resistor and integrated analog circuits using on-chip EA resistors. Phase change storage media...
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7372313 |
Variable impedance circuit and apparatus comprising said variable impedance circuit
A variable impedance circuit includes at least one fixed resistance and a plurality of transistors between a first and a second terminal. The transistors belonging to the plurality of transistors...
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7352259 |
Broadband step attenuator with improved time domain performance
An integrated step attenuator (“ISA”) monolithically integrated on a single chip for adjusting an input signal. The ISA may include a step attenuation network (“SAN”) that may include at...
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7352282 |
Communication system
A communication system includes a power line, a plurality of PLC networks connected to the power line in common, and an electronic control unit for controlling an electric equipment, connected to...
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7345556 |
Variable attenuation circuit having large attenuation amount with small circuit size
A variable attenuation circuit includes an attenuation circuit which has a first semiconductor variable impedance element, and an attenuation control circuit of which the impedance is changed by a...
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7345521 |
High frequency switch circuit
A high-frequency switch circuit has a plurality of high-frequency switches for passing and blocking a high-frequency signal between an input terminal and an output terminal depending on a control...
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7336130 |
Attenuator, variable gain amplifier using the same, and electronic equipment
An attenuator attenuates input signals and outputs the signals to an amplifier arranged to amplify signals applied to two input terminals. The attenuator includes first and second output terminals...
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7330086 |
Attenuator adapter
An attenuator pad adapter for utilizing a replacement attenuator pad in place of another attenuator pad intended for use on a printed circuit board. The attenuator pad adapter has a body portion...
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7304550 |
Wideband attenuator circuits and methods
Embodiments of the present invention include wideband attenuator circuits and methods. In one embodiment the present invention includes a first divider circuit coupled in series with two or more...
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7286001 |
High-frequency switching device and semiconductor device
The first terminals of a plurality of resistor elements are connected to the intermediate connection points of a plurality of FETs connected in series, and a voltage, having a phase opposite to...
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7283019 |
Tuneable phase shifter and/or attenuator using photoresponsive-material in a waveguide
The invention relates to a tuneable phase shifter and/or attenuator comprising a waveguide having a channel and a piece of photo-responsive material ( 18 ) disposed within the waveguide along an...
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7280005 |
AC coupling network with variable attenuation
An AC coupling network has (a) a first pair of capacitances C 1 connected between the input nodes and the output nodes and (b) a second pair of capacitances C 2 cross-connected between the input...
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7265604 |
High-frequency switch circuit arrangement
A high-frequency switch circuit arrangement. A plurality of stages (for example, two stages) of capacitative elements connected in series (C 11 and C 12 , C 21 and C 22 ) are used in a shunt path...
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7256664 |
Voltage controlled attenuator with no intermodulation distortion
A preferred embodiment of the present invention comprises at least first and second thermistors, arranged into a classical Tee, Pi, or Bridged Tee attenuator design, a heating element, a...
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7253700 |
Circuit for controlling a linear-in-decibels attenuator circuit using an analog control signal
A circuit for a digitally operating linear-in-decibels attenuator circuit controlled using an analog control signal. The attenuator circuit includes a resistor ladder, digitally controlled...
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7250804 |
Series/shunt switch and method of control
A switch includes at least two signal ports in series with a series FET connected therebetween, and a shunt path having an FET, whereby an input bias is applied to a gate on the series FET and to a...
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7245170 |
Attenuator and portable telephone terminal apparatus using the same
Provided are: at least one or more series variable resistors implemented by field effect transistors connected to a signal line A; and at least one or more shunt variable resistors implemented by...
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7221207 |
Semiconductor switching circuit for switching the paths of a high frequency signal in a mobile communications unit
A semiconductor apparatus is provided which makes it possible to reduce the number of control terminals required for switching through paths of a high frequency signal, simplify the circuit...
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7199664 |
Integrated switchless programmable attenuator and low noise amplifier
An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programable attenuation...
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7196566 |
High-resolution variable attenuation device
A variable attenuation device includes a resistive array having two or more input nodes, two or more output nodes, and two or more resistive devices for coupling the input nodes and the output...
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7184731 |
Variable attenuator system and method
A variable attenuator comprising a first attenuator for attenuating a RF signal according to a fixed voltage, a second attenuator connected in parallel to the first attenuator and attenuating the...
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7173471 |
High frequency switching circuit and semiconductor device
Four switching circuit sections consisting of four FETs connected in series are provided between a plurality of input/output terminals which output and input a high frequency signal. Gate control...
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7164995 |
Differential termination and attenuator network for a measurement probe
A differential termination and attenuator network receives a differential input signal having a DC common mode voltage. The network circuit includes input termination resistors coupled in parallel...
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7164994 |
Differential termination attenuator network for a measurement probe having an internal termination voltage generator
A differential termination and attenuator network having an internal common mode termination voltage generator includes first and second termination resistors coupled in parallel with corresponding...
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7157988 |
Voltage controlled resistor and a controlling method
The invention discloses a new and original voltage variable resistor VVR with input and output ports and a first input and second input for control signals to set the impedance between the input...
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7138846 |
Field effect transistor switch circuit
A field effect transistor switch circuit may include: ( 1 ) first, second, and third switch terminals; ( 2 ) a first field effect transistor, a pair of the main electrodes of which are connected...
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