A 1-GHZ BIPOLAR CLASS-AB OPERATIONAL-AMPLIFIER WITH MULTIPATH NESTED MILLER COMPENSATION FOR 76-DB GAIN

Authors
DELANGEN KJ ESCHAUZIER RGH VANDIJK GJA HUIJSING JH
Citation
Kj. Delangen et al., A 1-GHZ BIPOLAR CLASS-AB OPERATIONAL-AMPLIFIER WITH MULTIPATH NESTED MILLER COMPENSATION FOR 76-DB GAIN, IEEE journal of solid-state circuits, 32(4), 1997, pp. 488-498
Citations number
10
Categorie Soggetti
Engineering, Eletrical & Electronic
Journal title
IEEE journal of solid-state circuits → ACNP
ISSN journal
00189200
Volume
32
Issue
4
Year of publication
1997
Pages
488 - 498
Database
ISI
SICI code
0018-9200(1997)32:4<488:A1BCOW>2.0.ZU;2-I
Abstract
A 1-GHz operational amplifier with a gain of 76 dB while driving a 50- Omega load is presented. The equivalent input noise voltage is as low as 1.2 nV/root Hz. This combination of extremely high bandwidth, high gain, and low noise is the result of a three-stage all-n-p-n topology combined with a multipath nested Miller compensation, Using 10-GHz f(T ) n-p-n transistors, the realizable bandwidth could be of the order of 2-3 GHz. However, bond-wire inductances restrict the useful bandwidth to 1 GHz. The amplifier occupies an active area of 0.26 mm(2) and has been realized in the bipolar part of a 1-mu m BiCMOS process.