Voltage follower of small output resistance, large output amplitude
Title：
Voltage follower of small output resistance, large output amplitude
Application Number：
 200710064681
Application Date：
 2007/03/23
Announcement Date：
 2007/10/10
Pub. Date：
Publication Number：
 101051821
Announcement Number：
Grant Date：
Granted Pub. Date：
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 H03F 3/45
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Kong Yaohui, Yang Huazhong
Key Words：
 small output, resistance, large output, amplitude, Voltage follower
Abstract：
 Characters of the voltage follower are that a feedback loop is composed of one PMOS input tube M1, first current source I2, two NMOS tubes M2 and M3, a current sink I1, and second current source I3. The feedback loop reduces output resistance, and increases output amplitude of the voltage follower remarkably. At same time, drain electrode of the input tube of the voltage follower becomes a node with low impedance so as to make fluctuation of drain voltage of the input tube become smaller as well as reduce effect of channel modulation of input tube. Advantages are: small output resistance, large output amplitude, high linearity, and suitable to be operated at low voltage.
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