Power consumption is a key point in the design of high-speed switched capacitor (SC) circuits, which allow to efficiently implement a number of analog functions. Among them, SC Sigma Delta modulators are very popular for A/D conversion: in this kind of circuits, operational amplifiers are the most consuming cells because of their requirements in terms of DC gain and unity-gain frequency. A new amplifier with 110dB DC gain and a unity-gain frequency of 250MHz is presented The large power consumption (20mW) makes critical its use in commercial applications: however; combining this cell with a fast adaptive biasing circuit, high performance may be achieved with a reasonable dissipation
Cusinato, P., Stefani, F., Baschirotto, A. (2000). Power consumption reduction in high-speed Sigma Delta bandpass modulators. In ISLPED '00: PROCEEDINGS OF THE 2000 INTERNATIONAL SYMPOSIUM ON LOW POWER ELECTRONICS AND DESIGN (pp.55-60). IEEE [10.1109/LPE.2000.155253].
Power consumption reduction in high-speed Sigma Delta bandpass modulators
Baschirotto, A
2000
Abstract
Power consumption is a key point in the design of high-speed switched capacitor (SC) circuits, which allow to efficiently implement a number of analog functions. Among them, SC Sigma Delta modulators are very popular for A/D conversion: in this kind of circuits, operational amplifiers are the most consuming cells because of their requirements in terms of DC gain and unity-gain frequency. A new amplifier with 110dB DC gain and a unity-gain frequency of 250MHz is presented The large power consumption (20mW) makes critical its use in commercial applications: however; combining this cell with a fast adaptive biasing circuit, high performance may be achieved with a reasonable dissipation
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