TY - JOUR
AU - Schaik, André
AB - Mixed-signal or analog chips often require a wide range of biasing currents that are independent of process and supply voltage and that are proportional to absolute temperature. This paper describes CMOS circuits that we use to generate a set of fixed bias currents typically spanning six decades at room temperature down to a few times the transistor off-current. A bootstrapped current reference with a new startup and power-control mechanism generates a master current, which is successively divided by a current splitter to generate the desired reference currents. These references are nondestructively copied to form the chip’s biases. Measurements of behavior, including temperature effects from 1.6 and 0.35 μ implementations, are presented and nonidealities are investigated. Temperature dependence of the transistor off-current is investigated because it determines the lower limit for generated currents. Readers are directed to a design kit that allows easy generation of the complete layout for a bias generator with a set of desired currents for scalable MOSIS CMOS processes.
TI - Bias Current Generators with Wide Dynamic Range
JF - Analog Integrated Circuits and Signal Processing
DO - 10.1007/s10470-005-1606-1
DA - 2005-01-01
UR - https://www.deepdyve.com/lp/springer-journals/bias-current-generators-with-wide-dynamic-range-jaEnEgsp05
SP - 247
EP - 268
VL - 43
IS - 3
DP - DeepDyve
ER -