Title :
Low-power BiCMOS op-amp with integrated current-mode charge pump
Author_Institution :
Gain Technol. Corp., Tucson, AZ, USA
fDate :
7/1/2000 12:00:00 AM
Abstract :
An operational amplifier with an integrated current-mode charge pump is presented. This operational amplifier functions with a 4-/spl mu/A single-supply above-the-rail input and rail-to-rail output. Having an integrated charge pump greatly simplifies the amplifier design while providing an increased dynamic range over other rail-to-rail amplifiers. The current-mode charge pump limits the power loss associated with feedthrough current found in most voltage mode designs. The resulting amplifier, designed with a dual-well BiCMOS process, achieves a bandwidth of 54 kHz while consuming less than 10 /spl mu/W.
Keywords :
BiCMOS analogue integrated circuits; current-mode circuits; integrated circuit design; low-power electronics; operational amplifiers; 10 muW; 4 muA; 54 kHz; current-mode charge pump; dual-well BiCMOS process; dynamic range; feedthrough current; integrated current-mode charge pump; low-power BiCMOS op-amp; power loss; rail-to-rail amplifiers; rail-to-rail output; single-supply above-the-rail input; voltage mode designs; Analog circuits; BiCMOS integrated circuits; Charge pumps; Dynamic range; Energy consumption; MOS devices; Operational amplifiers; Rail to rail amplifiers; Rail to rail inputs; Voltage;
Journal_Title :
Solid-State Circuits, IEEE Journal of
