A 40mhz 70db gain variable gain amplifier design using the gm/id design method

2008 ◽  
Author(s):  
Fernando Paixão Cortes ◽  
Sergio Bampi
Keyword(s):  
Design Method ◽  
Variable Gain Amplifier ◽  
Variable Gain ◽  
Amplifier Design

scholarly journals A 40 MHz 70 dB Gain Variable Gain Amplifier Design Using the gm/ID Design Method

2009 ◽  
Vol 4 (1) ◽  
pp. 7-12
Author(s):  
Fernando Paixão Cortes ◽  
Sergio Bampi
Keyword(s):  
Design Method ◽  
Gain Control ◽  
Variable Gain Amplifier ◽  
Cmos Process ◽  
Offset Cancellation ◽  
Variable Gain ◽  
Offset Voltage ◽  
Amplifier Design ◽  
Time Offset ◽  
Bond Pads

This paper addresses the design and post-fabrication measurements of a 40 MHz CMOS Variable Gain Amplifier (VGA) with a 0 to 70 dB gain control range, using the gm/ID design methodology. The VGA architecture is based on a differential pair stage with an automatic continuous-time offset cancellation circuitry, providing an input offset voltage tolerance up to 50 mV. The 3-stage VGA was designed and fabricated through MOSIS service in an IBM 0.18 μm CMOS process. The VGA dissipates 2.6 mA from a 1.8 V supply, with 34,840 μm2 circuit area, excluding bond-pads.

An Advanced Traveling Wave Matching Network for DC-12GHz Variable Gain Amplifier Design

2013 ◽  
Vol 321-324 ◽  
pp. 331-335
Author(s):  
Shan Wen Hu ◽  
Tao Chen ◽  
Huai Gao ◽  
Long Xing Shi ◽  
G.P. Li
Keyword(s):  
Traveling Wave ◽  
Noise Figure ◽  
Gain Control ◽  
Wide Band ◽  
Variable Gain Amplifier ◽  
Control Voltage ◽  
Variable Gain ◽  
Input Matching ◽  
Amplifier Design ◽  
Wave Matching

A traveling wave matching (TWM) network is proposed for broadband variable gain amplifier design. The TWM network lessens input return loss and noise figure dependence on VGA’s gain, which is adjusted by biasing of the gain control circuit. A wide band (DC to 12 GHz) VGA with the novel TWM network as input matching is implemented in 2μm InGaP/GaAs HBT (fT of 29.5GHz) technology with die size of 1×2 mm2. As gain control voltage sweeps, the VGA shows a gain tuned from -15 dB to 15 dB and an average noise figure ranging from 8dB to 6.5dB, while S11 (lower than -20dB) and S22 (lower than -10dB) almost unchanged over the operation frequency band.

dB-Linear Variable Gain Amplifier Design in 0.18 μm Process with Optimization

2017 ◽  
Vol 10 (4) ◽  
pp. 151-158 ◽  
Author(s):  
Sawssen Lahiani ◽  
Samir Ben Salem ◽  
Houda Daoud ◽  
Mourad Loulou
Keyword(s):  
Variable Gain Amplifier ◽  
Variable Gain ◽  
Amplifier Design
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