STACKED DIGITAL CURRENT STEERING AUTOMATIC GAIN CONTROL ATTENUATOR
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United States of America Patent
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Issued Date -
Jul 4, 2024
app pub date -
Dec 28, 2022
filing date -
Dec 28, 2022
priority date (Note) -
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Abstract
An automatic gain control (AGC) attenuator for an amplifier. In one example, the AGC attenuator includes a first transistor stack including a plurality of first banks of current steering differential transistor pairs and configured to receive a radio frequency (RF) input signal and output a first attenuated RF signal. Each first bank of the plurality of first banks is configured to attenuate the RF input signal by a predetermined value. The AGC attenuator also includes a second transistor stack that includes a plurality of second banks of current steering differential transistor pairs. The second transistor stack is cascoded to the first transistor stack, and is configured to receive the first attenuated RF signal and output a second attenuated RF signal. Each second bank of the plurality of second banks is configured to attenuate the first attenuated RF signal by a predetermined value.
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