Modified CMOS Op-Amp with improved gain and bandwidth : Analog Circuit and Device Technologies
In: IEICE transactions on electronics, Jg. 89 (2006), Heft 6, S. 775-780
Online
academicJournal
- print, 7 ref
Zugriff:
This paper presents a novel gain boosted and bandwidth enhanced CMOS Op-Amp based on the well-known folded cascode structure. In contrast with the conventional methods which increase output resistance for gain boosting, the transconductance of the circuit is increased, therefore the -3 dB frequency is the same as for folded cascode structure. With negligible extra power consumption, the unity gain bandwidth is increased considerably. In this method, a new node is created in the circuit which introduces a pole to the transfer function with a frequency lower than cascode pole; feed-forward compensation is employed to reduce the effect of this pole on the frequency response. The input common mode range is limited slightly by 0.2-0.3 V with respect to folded cascode which is insensible. HSPICE simulations using level 49 parameters (BSIM3v3) in a typical 0.35μm CMOS technology result in three times gain boosting and 60% enhancement in unity gain bandwidth compared to folded cascode, while the power consumption is increased by 10%.
Titel: |
Modified CMOS Op-Amp with improved gain and bandwidth : Analog Circuit and Device Technologies
|
---|---|
Autor/in / Beteiligte Person: | MOTTAGHI-KASHTIBAN, Mahdi ; HADIDI, Khayrollah ; KHOEI, Abdollah |
Link: | |
Zeitschrift: | IEICE transactions on electronics, Jg. 89 (2006), Heft 6, S. 775-780 |
Veröffentlichung: | Oxford: Oxford University Press, 2006 |
Medientyp: | academicJournal |
Umfang: | print, 7 ref |
ISSN: | 0916-8524 (print) |
Schlagwort: |
|
Sonstiges: |
|