A low-voltage low-power wide-range CMOS variable gain amplifier

被引:77
作者
Motamed, A [1 ]
Hwang, C [1 ]
Ismail, M [1 ]
机构
[1] Ohio State Univ, Analog VLSI Lab, Dept Elect Engn, Solid State Microelect Lab, Columbus, OH 43210 USA
来源
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-ANALOG AND DIGITAL SIGNAL PROCESSING | 1998年 / 45卷 / 07期
关键词
D O I
10.1109/82.700927
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In this paper, a compact low-power (LP) low-voltage (LV) metal-oxide-semiconductor only (MOS-only) variable gain amplifier (VGA) is introduced. This amplifier based on complementary MOS (CMOS) transistors operating in strong inversion is composed of a pseudo-exponential current-to-voltage converter, analog multiplier, and output stage. The gain of the amplifier is controlled exponentially by a novel wide-range pseudo-exponential current-to-voltage converter implemented with two back-to-back connected current mirrors exhibiting superb exponential characteristic. Also, a new LV/LP composite transistor is introduced to increase the input dynamic range of the multiplier. The amplifier is fabricated using a 2-mu m MOSIS n-well process, and its simulation and measurement results are shown in detail.
引用
收藏
页码:800 / 811
页数:12
相关论文
共 17 条
[1]  
Allen P. E., 1987, CMOS Analog Circuit Design
[2]   A LOW-POWER CMOS VGA FOR 50 MB/S DISK-DRIVE READ CHANNELS [J].
HARJANI, R .
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-ANALOG AND DIGITAL SIGNAL PROCESSING, 1995, 42 (06) :370-376
[3]  
Ismail M., 1994, ANALOG VLSI SIGNAL I
[4]  
Michel J. Y., 1991, Analog Integrated Circuits and Signal Processing, V1, P171, DOI 10.1007/BF00195621
[5]   CMOS exponential current-to-voltage converter [J].
Motamed, A ;
Hwang, C ;
Ismail, M .
ELECTRONICS LETTERS, 1997, 33 (12) :998-1000
[6]  
MOTAMED A, 1996, THESIS OHIO STATE U
[7]  
Motchenbacher C.D., 1993, Low-Noise Electronic System Design"
[8]   A 50-DB VARIABLE GAIN AMPLIFIER USING PARASITIC BIPOLAR-TRANSISTORS IN CMOS [J].
PAN, TW ;
ABIDI, AA .
IEEE JOURNAL OF SOLID-STATE CIRCUITS, 1989, 24 (04) :951-961
[9]  
RODRIGUEZVAZQUE.A, 1995, IEEE T CIRCUITS SYST, V42
[10]   HIGH-FREQUENCY WIDE-RANGE CMOS ANALOG MULTIPLIER [J].
SAKURAI, S ;
ISMAIL, M .
ELECTRONICS LETTERS, 1992, 28 (24) :2228-2229