A Digitally-Controlled Variable Gain Amplifier with 0.5-dB Step and Constant-Bandwidth for Passive MM-wave Imaging Receiver

2018 ◽  
Author(s):  
Long He ◽  
Lianming Li ◽  
Xu Wu ◽  
Zhigong Wang
Keyword(s):  
Variable Gain Amplifier ◽  
Variable Gain ◽  
Digitally Controlled ◽  
Wave Imaging ◽  
Imaging Receiver ◽  
Constant Bandwidth

A Fully Differential Variable Gain Amplifier for Portable Impedance Sensing Applications

2019 ◽  
Vol 7 ◽  
Author(s):  
Jorge Pérez Bailón ◽  
Jaime Ramírez-Angulo ◽  
Belén Calvo ◽  
Nicolás Medrano
Keyword(s):  
Power Consumption ◽  
Active Area ◽  
Variable Gain Amplifier ◽  
Cmos Process ◽  
Current Steering ◽  
Impedance Sensing ◽  
Variable Gain ◽  
Fully Differential ◽  
Sensing Applications ◽  
Constant Bandwidth

This paper presents a Variable Gain Amplifier (VGA) designed in a 0.18 μm CMOS process to operate in an impedance sensing interface. Based on a transconductance-transimpedance (TC-TI) approach with intermediate analog-controlled current steering, it exhibits a gain ranging from 5 dB to 38 dB with a constant bandwidth around 318 kHz, a power consumption of 15.5 μW at a 1.8 V supply and an active area of 0.021 mm2.

84 dB 5.2 mA digitally-controlled variable gain amplifier

2008 ◽  
Vol 44 (5) ◽  
pp. 344 ◽  
Author(s):  
H.-H. Nguyen ◽  
Q.-H. Duong ◽  
S.-G. Lee
Keyword(s):  
Variable Gain Amplifier ◽  
Variable Gain ◽  
Digitally Controlled

A digitally controlled variable-gain amplifier†

1970 ◽  
Vol 29 (3) ◽  
pp. 241-247
Author(s):  
D. K. BASU ◽  
S. DAS ◽  
R. DATTA GUPTA
Keyword(s):  
Variable Gain Amplifier ◽  
Variable Gain ◽  
Digitally Controlled

Low-power 42 dB-linear single-stage digitally-controlled variable gain amplifier

2008 ◽  
Vol 44 (13) ◽  
pp. 780 ◽  
Author(s):  
H.-H. Nguyen ◽  
Q.-H. Duong ◽  
H.-B. Le ◽  
J.-S. Lee ◽  
S.-G. Lee
Keyword(s):  
Low Power ◽  
Single Stage ◽  
Variable Gain Amplifier ◽  
Variable Gain ◽  
Digitally Controlled

DIGITALLY CONTROLLED CMOS BALANCED OUTPUT TRANSCONDUCTOR AND APPLICATION TO VARIABLE GAIN AMPLIFIER AND GM-C FILTER ON FIELD PROGRAMMABLE ANALOG ARRAY

2005 ◽  
Vol 14 (04) ◽  
pp. 667-684 ◽  
Author(s):  
SOLIMAN A. MAHMOUD
Keyword(s):  
Cutoff Frequency ◽  
Wide Band ◽  
Control Word ◽  
Variable Gain Amplifier ◽  
Variable Gain ◽  
Fully Differential ◽  
Programmable Analog ◽  
Digitally Controlled ◽  
Field Programmable ◽  
Field Programmable Analog Array

A digitally controlled balanced output transconductor (DCBOTA) is proposed and analyzed. The proposed DCBOTA is based on the BOTA given in Ref. 1 and MOS switches. The DCBOTA transconductance is tunable in a range of 2n-1 times using n bits control word. The proposed DCBOTA is simulated using CMOS 0.35 μm technology and the results have shown the feasibility of the proposed DCBOTA. The simulation results show that the DCBOTA has a transconductance tuning range from 20 μA/V to 140 μA/V using 3 bits control word and a 3-dB bandwidth larger than 80 MHz. A general configurable analog block (CAB) based on the proposed DCBOTA, capacitor array and MOS switches, is also presented. A collection of the CABs, fully differential buffers (FDBUFs), and their interconnection to construct a field programmable analog array (FPAA) is introduced. The DCBOTA is also used to realize a wide band digitally controlled variable gain amplifier (DCVGA) and six-order lowpass filter with variable gain and tunable cutoff frequency from 1 MHz to 7 MHz.

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