TIA-to-ADC interface with low-noise and a wide-range of passive gain control
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United States of America Patent
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Oct 6, 2015
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Jun 11, 2015
app pub date -
Feb 13, 2015
filing date -
Dec 18, 2012
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Abstract
A circuit for a low-noise interface between an amplifier and an analog-to-digital converter (ADC) may comprise a capacitor element having a capacitance of C coupled between a first and second output node of the amplifier. A resistor circuit coupled between the capacitor element and input nodes of the ADC. A desired value RL for a load resistance of the amplifier is provided by selecting suitable initial values for resistances of the resistor circuit. A desired bandwidth for the at least one amplifier is achieved by selecting a value of the capacitance C based on the desired value RL for the load resistance.
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