Low voltage, low power amplifiers are proposed. One of the operational amplifiers is an Operational Transconductance Amplifier (OTA) with wide input and output swing and constant gm. The second and third amplifiers are high-performance Current Operational amplifiers (COAs). All amplifiers have power supply as low as one threshold voltage plus two overdrive voltage.
In this thesis, the supply voltage is 1V. Simulation results show that the OTA has the maximum linear range over 0.7V. The transconductance can be 147£gA/V, the power consumption is 0.133mW. There are two designs of the COA. Simulation results show COA(1) with a current gain of 143. The input impedance is 110£[, the output impedance is 240K£[ and the power consumption is 0.15mW. In the simulation results of the COA(2), the current gain is 110. The DC power dissipation is 0.07mW. The input and output impedance are 95£[ and 500K£[, respectively.
All the proposed amplifiers are implemented on a TSMC 0.35£gm 2p4m CMOS process technology and analyzed using HSPICE.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0715104-134800 |
| Date | 15 July 2004 |
| Creators | Han, Cheng-ping |
| Contributors | Jyi-Tsong Lin, Yao-Tsung Tsai, Shyh-Jye Jou, Chia-Hsiung Kao |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0715104-134800 |
| Rights | restricted, Copyright information available at source archive |
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