Title :
A low-voltage regulator circuit with self-bias to improve accuracy
Author_Institution :
Commun. & ASIC Technol. Dept., LSI Logic Corp., San Jose, CA, USA
fDate :
2/1/2003 12:00:00 AM
Abstract :
There are a number of applications where a voltage follower with low output impedance, capable of driving capacitive load, is required. In many cases, the load also consists of a resistor in parallel with a large capacitor. The operational amplifier (opamp) design for such loads is quite challenging when a high closed-loop bandwidth is also required. In this paper, a novel technique is presented whereby the opamp is biased off the load itself, thereby increasing accuracy while at the same time remaining simple enough to be compensated easily.
Keywords :
CMOS analogue integrated circuits; linear network analysis; operational amplifiers; voltage regulators; CMOS process; LV regulator; capacitive load driving; high closed-loop bandwidth; low output impedance; low-voltage regulator circuit; opamp biasing; opamp design; operational amplifier design; self-bias; voltage follower; CMOS process; CMOS technology; Capacitors; Circuits; Operational amplifiers; Performance gain; Regulators; Resistors; Tail; Voltage;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2002.807396
