GaAs HBT 0.75-5 GHz multifunctional microwave-analog variable gain amplifier

Kobayashi, K.W.; Ip, K.T.; Oki, A.K.; Umemoto, D.K.; Claxton, S.; Pope, Michael A.; Wiltz, J.

doi:10.1109/4.315212

Cited by 31 publications

(5 citation statements)

References 4 publications

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“…The feedback resistor can self-bias the circuit and solve the common-mode problem and has the potential for high linearity. However, it ends up loading the previous stage output, as the input impedance is no longer large compared to the gate input of a MOSFET, which limits the gain [12]. The variable resistor can be implemented by varying the control voltage at the gate of the transistor, but the linear relationship between the control voltage and corresponding resistance is only valid in the triode region of the transistor.…”

Section: A Vga Gain Cell Topologiesmentioning

confidence: 98%

Design of a Low Power, Inductorless Wideband Variable-Gain Amplifier for High-Speed Receiver Systems

Wang

Afshar

Lü

et al. 2012

IEEE Trans. Circuits Syst. I

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This paper presents the design and analysis of a wideband inductorless variable-gain amplifier (VGA) for high-speed communication receiver systems. The proposed methodology of using a dual-feedback network for bandwidth extension and dc offset cancellation is analyzed theoretically. The proof of concept is verified by a measured stand-alone VGA chip and it achieves several record performances compared to the existing publications up to date. The chip achieves a 2.2 GHz 3-dB bandwidth with wide tuning range from 10 dB up to 50 dB. Moreover, it consumes only 2.5 mW through a 1 V supply and occupies 0.01 active area in a standard 90 nm CMOS technology.

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Section: A Vga Gain Cell Topologiesmentioning

confidence: 98%

Design of a Low Power, Inductorless Wideband Variable-Gain Amplifier for High-Speed Receiver Systems

Wang

Afshar

Lü

et al. 2012

IEEE Trans. Circuits Syst. I

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“…9 is based on the Gilbert cell. This approach is presented in numerous papers, to mension a few [17][18][19]. The gain is adjusted by altering the control voltage V ctrl .…”

Section: Variable Gain Amplifiermentioning

confidence: 99%

A VLSI Implementation of Low Power, Low Data Rate UWB Transceiver for Location and Tracking Applications

Tiuraniemi

Stoica

Rabbachin

et al. 2006

J VLSI Sign Process Syst Sign Image Video Technol

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A low power, low data rate ultra wideband (UWB) impulse radio transceiver for location and tracking applications is presented in this paper. The UWB receiver is based on a non-coherent, energy collection approach, which makes the receiver highly independent of the shape of the transmitted waveform. The UWB signal is generated by a pulse generator and band-pass filter fixing the signal bandwidth to 1 GHz in the band from 3.1 GHz to 4.1 GHz. The modulation scheme used in this time division multiple access system (TDMA) is Binary Pulse Position Modulation (BPPM). In this paper the system concept, system architecture and RF parts of the VLSI implementation are peresented. The transceiver is implemented in a 0.35 μm SiGe process provided by Austria Microsystems.

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“…Usually, variable gain amplifiers (VGA) for the gain controlling function show fairly poor linearity when reduce amplifier gain. Conventional VGAs have been using cascode or dual gate structure [1][2] or current steering technique [3][4] to realize gain controlling function. However, those amplifiers show poor linearity when reduced amplifier gain.…”

Section: Introductionmentioning

confidence: 99%

Constant Linearity Variable Gain Traveling Wave Amplifier MMIC for 1 to 26.5 GHz Applications

Fujii

Morkner

2006

2006 European Microwave Integrated Circuits Conference

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This paper describes the design and test results of a constant linearity variable gain traveling wave amplifier (VGTWA) suitable for 1 to 26.5GHz applications. The constant linearity VGTWA consists of variable feedback cascode stages, input artificial transmission line, output artificial transmission line, and a Drain DC biasing network. The VGTWA was fabricated by the Avago's 0.25gm Enhancement Mode PHEMTprocess thus requires only a positive supply for bias and control. The constant linearity VGTWA exhibits 9 +/-2 dB of maximum small signal gain between 1 and 26.5GHz frequencies with 15dB gain control. The TGTWA exhibits 14dBm minimum output 3rd order intercept point over the gain controlling range. The VGTWA also exhibits constant input/output return losses over the gain controlling conditions.

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GaAs HBT 0.75-5 GHz multifunctional microwave-analog variable gain amplifier

Cited by 31 publications

References 4 publications

Design of a Low Power, Inductorless Wideband Variable-Gain Amplifier for High-Speed Receiver Systems

Design of a Low Power, Inductorless Wideband Variable-Gain Amplifier for High-Speed Receiver Systems

A VLSI Implementation of Low Power, Low Data Rate UWB Transceiver for Location and Tracking Applications

Constant Linearity Variable Gain Traveling Wave Amplifier MMIC for 1 to 26.5 GHz Applications

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