dB linear variable gain amplifier

摘要

A dB gain amplifier for providing a levelized output signal includes a first transconductance circuit to output a first current in a first current path, a second transconductance circuit to output a second current in a second current path, a first current mirror to control the first current in the first current path, a second current mirror to control the second current in the second current path, and a DAC circuit to control the first and second current mirrors piecewise linearly.