CPC H03F 3/04 (2013.01) [H02M 3/155 (2013.01); H03F 1/086 (2013.01); H03F 3/45192 (2013.01); H03F 3/505 (2013.01); H03F 2203/45124 (2013.01)] | 13 Claims |
1. An amplifier, comprising:
a first stage including:
an output;
a first compensation network coupled to the output of the first stage;
a second stage including:
a source follower including:
an input coupled to the output of the first stage; and
an output; and
a second compensation network coupled between the input of the source follower and the output of the source follower;
wherein:
the source follower includes a first transistor having:
a first current terminal coupled to a power supply terminal;
a second current terminal coupled to the second compensation network; and
a control terminal coupled to the output of the first stage; and
the second stage includes:
a second transistor including:
a first current terminal coupled to the first current terminal of the first transistor;
a control terminal coupled to the control terminal of the first transistor; and
a second current terminal; and
a current mirror circuit coupled to the second current terminal of the first transistor and the second current terminal of the second transistor, wherein the current mirror circuit includes:
a third transistor including:
a first current terminal coupled to the second current terminal of the first transistor;
a second current terminal coupled to ground; and
a control terminal; and
a fourth transistor including:
a first current terminal coupled to the second current terminal of the second transistor;
a control terminal coupled to the control terminal of the third transistor; and
a second current terminal coupled to the control terminal of the third transistor.
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