Integrator with high gain and fast transient response
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United States of America Patent
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Jan 13, 2004
Grant Date -
N/A
app pub date -
Aug 8, 2001
filing date -
Aug 8, 2001
priority date (Note) -
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Abstract
A multi-stage integrator achieves a relatively high small-signal gain, broad bandwidth, and very clean transient pulse response. Only simple inverters are used, making the design scalable to deep sub-micron with low supply voltages, a rail-to-rail output swing, and a relatively low output impedance and useful tolerance to capacitive loading. A high gain amplifier is coupled between an integrator input node and amplifier output node. A broadband transconductor is coupled between the integrator input node and integrator output node. A resistor connects the amplifier output node and the integrator output, while a capacitor is coupled from the integrator input to the amplifier output. The conductance of the resistor (the reciprocal of the resistance, or 1/R) is selected to be substantially equal to the transconductance g.sub.m of the transconductor. A method for achieving clean transient pulse response is also described.
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