
Products
JoAnn Close is a design group leader at Analog Devices, Inc. Among the products that
she has designed are the:
-
ADA4941-1
Single-supply, low power differential 18-bit ADC driver.
-
ADA4841-1
Low power, low noise, low distortion rail-to-rail output amplifier (ADA4841-2
is the dual version).
-
AD8045
JoAnn's first 1GHz chip is an ultralow distortion voltage feedback amplifier.
-
AD8139
Ultra low noise, fully differential ADC driver. See the
analogZone review that
calls it a "gem" with superb dynamic performance criteria.
-
AD8065 One of the FastFETs® - a fast low-noise FET input
operational amplifier (AD8066 is the dual version;
AD8067
is a decompensated version, stable at gains of 10 and greater).
-
AD8391 xDSL line drive amplifier, suitable for voice over DSL applications
-
AD8018
Low-power ADSL line driver suitable for USB and PCMCIA
-
AD8061
Really fast single supply operational amplifier (AD8062
is the dual version;
AD8063
is a single with disable)
-
AD8170
Very
high speed 2:1 buffered multiplexer (AD8174 is 4:1
version). Also see Eamon Nash's article on
Buffered
Multiplexers for Video Applications.
-
AD822 Dual
precision, low power FET input operational amplifier with single supply capability (AD820 is the single
version,
AD824 is
the quad version)
-
AD795 Low
noise, precision FET input operational amplifier
-
AD549
Monolithic electrometer operational amplifier with very low input bias current
-
AD648 Matched
pair of low power, precision monolithic operational amplifiers (AD548 is the single
version)
Patents
Blog
Publications
- Close, J. P. and Santos, F. A JFET input single supply operational
amplifier with rail-to-rail output. Proceedings of the Bipolar/BiCMOS
Circuits and Technology Meeting, October 4-5, 1993, pp. 149-152.
- Close, J. P., DeVito, L. M. and Quinn, D. E. Hall cell geartooth sensor
with 15 Gauss sensitivity. International Solid-State Circuits Conference
Digest of Technical Papers, Vol. 33, February 14-16, 1990, pp. 240-241,
304.
- Close, J. P. and Counts, L. W. A 50-fA junction-isolated operational amplifier. IEEE
Journal of Solid-State Circuits, 23 (3), June 1988, 843-851.
- Close, J. P. and Counts, L. W. A 50fa input current junction-isolated JFET opamp. International Solid-State Circuits Conference Digest of Technical
Papers, Vol. 29, February 19-21, 1986, pp. 12-13, 284-285.
Copyright © 2009 by Michael Good and JoAnn
Close.
Last updated November 2, 2009.