Title :
A -80 dB THD, 4 Vpp switched capacitor filter for 1.5 V battery-operated systems
Author :
Nicollini, G. ; Nagari, A. ; Confalonieri, P. ; Crippa, C.
Author_Institution :
SGS-Thomson Microelectron., Milan, Italy
fDate :
8/1/1996 12:00:00 AM
Abstract :
A fully differential fifth-order SC filter that can operate from power supplies as low as 1.5 V featuring a -80 dB THD up to 4 Vpp output voltage is presented. A measured p-weighted noise of 120 μVrms leads to a dynamic range of 81.5 dB. This circuit is used as reconstruction filter for a low voltage 14-b DAC. The very low voltage operation has been possible by integrating a regulated voltage-multiplier on the same chip. The filter active area is 0.54 mm 2 in a 0.8 μm CMOS technology. Typical power consumption is 0.8 mW at 1.5 V supply
Keywords :
CMOS analogue integrated circuits; active filters; switched capacitor filters; 0.8 mW; 0.8 micron; 1.5 V; CMOS technology; battery-operated systems; fifth-order SC filter; fully differential SC filter; low voltage operation; reconstruction filter; regulated voltage-multiplier; switched capacitor filter; Active filters; CMOS technology; Circuit noise; Dynamic range; Energy consumption; Integrated circuit measurements; Low voltage; Noise measurement; Power supplies; Semiconductor device measurement;
Journal_Title :
Solid-State Circuits, IEEE Journal of
