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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Coban, A.L. Allen, P.E. |
| Copyright Year | 1995 |
| Description | Author affiliation: Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA (Coban, A.L.; Allen, P.E.) |
| Abstract | A 2 V low-voltage CMOS op amp with a new rail-to-rail constant-g/sub m/ input stage and a high-gain, high-swing output stage is presented. The input stage consists of two complementary differential pairs whose tail currents are controlled by the common-mode input signal in such a way that the total transconductance (g/sub m/) of the input transistors remains as flat as possible across the input common-mode range. The output stage employs composite transistors based on regulated-cascode circuits (RGC) with large feedback gains. DC measurements were performed on an experimental op amp fabricated in a standard 2 /spl mu/m, p-well CMOS process. The low-frequency gain is larger than 80 dB. The g/sub m/ variation is about 15% from rail-to-rail. Output signal can swing within 200 mV of each supply rail and input range exceeds both rails. The power dissipation is about 540 /spl mu/W. Simulated unity-gain frequency is 5 MHz with 15 pF load capacitance. |
| Starting Page | 1548 |
| Ending Page | 1551 |
| File Size | 443263 |
| Page Count | 4 |
| File Format | |
| ISBN | 0780325702 |
| DOI | 10.1109/ISCAS.1995.521431 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1995-04-30 |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Operational amplifiers Rail to rail inputs Rail to rail outputs Tail Transconductance Feedback circuits Output feedback Performance evaluation Measurement standards CMOS process |
| Content Type | Text |
| Resource Type | Article |
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