Title :
A 300 MHz 18 dB variable gain amplifier
Author :
Hadidi, Kh ; Jenabi, M. ; Sobhi, J. ; Hasankhaan, A.
Author_Institution :
Dept. of Electr. Eng., Urmia Univ., Iran
Abstract :
This paper presents a very linear variable gain amplifier (VGA) which requires no capacitor or resistor array. Due to its special structure, the circuit does not trade bandwidth for gain. Thus, bandwidth is almost independent of gain. Although the proposed VGA consumes a small amount of power, 22 mW, from a 3.3 volt supply it has a 310 MHz -3 dB bandwidth. THD simulation results are -45 dB for a 800 mV p-p input, at 0 dB gain
Keywords :
automatic gain control; circuit simulation; feedback amplifiers; harmonic distortion; programmable circuits; -3 dB bandwidth; 18 dB; 22 mW; 3.3 V; 310 MHz; AGC; THD simulation results; VGA; programmable gain amplifiers; very linear variable gain amplifier; Bandwidth; Capacitance; Circuit noise; Circuit simulation; Equations; Frequency response; Gain; Noise level; Solid state circuits; Temperature dependence;
Conference_Titel :
Electronics, Circuits and Systems, 1998 IEEE International Conference on
Conference_Location :
Lisboa
Print_ISBN :
0-7803-5008-1
DOI :
10.1109/ICECS.1998.814012
