| 摘要 |
An addition is made to the prior art amplifier of additional transistor (M9) controlled by the input voltage, Vin, in series with the second stage (M5, M6) and a capacitor level shifter (C1) between the output of the first stage (junction of M2 and M3) of the amplifier and the gate terminal of the source follower transistor M7. This capacitor C1 is charged such that the signal between the first stage and the source follower stage sees an upward dc voltage shift, thus maintaining the quiescent gate voltage for the source follower transistor M7 close to or even higher than the supply voltage while maintaining the quiescent voltage at the output of the first stage (junction of M1 and M2) sufficiently low for transistors M2 and M3 to operate in saturation regions.
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