Title :
Approach to high-linear programmable gain amplifiers
Author :
Sanz, M.T. ; Celma, S. ; Calvo, B.
Author_Institution :
Electron. Design Group, Zaragoza Univ., Spain
Abstract :
Two different approaches to digitally programmable gain amplifiers (PGAs) are presented in this paper and compared in terms of linearity, frequency, area and power consumption. They are characterized by their inherently high linearity and wide gain tuning. In the first proposal, linearity is achieved by using poly resistor arrays whereas the second is based on a MOST-only inherently linear current division principle. The paper presents the principles of operation and design equations of both approaches, in addition to experimental results in a 2.5 V 0.35 μm CMOS process which show their trade-offs.
Keywords :
CMOS integrated circuits; amplifiers; circuit tuning; integrated circuit design; power consumption; programmable circuits; resistors; 0.35 micron; 2.5 V; CMOS process; MOST; circuit tuning; digitally programmable gain amplifiers; high linear programmable gain amplifiers; integrated circuit design; linear current division principle; polyresistor arrays; power consumption; CMOS process; Electronics packaging; Energy consumption; Equations; Frequency; Linearity; Power amplifiers; Proposals; Resistors; Tuning;
Conference_Titel :
Circuits and Systems, 2004. MWSCAS '04. The 2004 47th Midwest Symposium on
Print_ISBN :
0-7803-8346-X
DOI :
10.1109/MWSCAS.2004.1353921
