Power Reduction in Continuous-Time Delta-Sigma Modulators Using the Assisted Opamp Technique
Citations
235 citations
Additional excerpts
...[74]; CT- Ms [53], [66], [67], [69], [136]....
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104 citations
Cites background or methods from "Power Reduction in Continuous-Time ..."
...[19] and [14] are audio CTDSMs targeting similar specifications in the same process technology....
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...[19] is a multibit design, while [14] is a single-bit CTDSM with the linearity of the first opamp being enhanced by the assisted opamp technique....
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...Thus, no extra resistors are needed to realize and [14]....
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88 citations
Cites methods from "Power Reduction in Continuous-Time ..."
...Power reduction is achieved in our design by implementing and using the assisted-opamp technique [15], where a replica of the integrator input current is injected into the output of the opamp....
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68 citations
67 citations
Cites background or methods from "Power Reduction in Continuous-Time ..."
...Indeed, this technique can be applied to different OTA topologies [22], [23], including two-stage feedforward compensated and Miller-compensated OTAs, featuring state-of-the-art...
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...(CIFF) topology with single-bit quantization [22], [23], [26],...
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...[22] and conceptually illustrated in the single-bit CT- M shown in Fig....
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...CT- M with assisted-opamp integrator proposed in [22]....
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...Note that the most efficient designs are mainly based on CT circuits, some of them featuring a FOMS over 175 dB [22]–[26]....
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References
2,200 citations
"Power Reduction in Continuous-Time ..." refers methods in this paper
...Since the noise performance is dominated by thermal noise, it is also relevant to compute the FOM proposed by Schreier [12] given by Note that is a logarithmic measure....
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...Since the noise performance is dominated by thermal noise, it is also relevant to compute the FOM proposed by Schreier [12] given by...
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575 citations
"Power Reduction in Continuous-Time ..." refers methods in this paper
...The discussion in Section I indicates that the design of the first integrator with adequate linearity and low power dissipation represents a significant challenge in the design of high performance single bit CTDSMs....
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...This technique was applied to the design of audio-frequency third-order CTDSMs (with NRZ and SCR feedback DACs) implemented in a 0.18 m CMOS technology....
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...This technique, originally proposed to reduce distortion in discretetime DSMs [8] is adopted in our continuous-time design....
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...Several modulators targeting the audio range have been reported recently, where power reduction is the main motivation for choosing CTDSMs over their discrete-time counterparts [1]–[6]....
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...Thanks to this approach, we are able to achieve 15 bit performance in single bit CTDSMs based on NRZ and SCR feedback DACs with power dissipation that is comparable to that of the multibit modulator we reported in [6]....
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268 citations
209 citations
164 citations
"Power Reduction in Continuous-Time ..." refers methods in this paper
...For the modulator with the NRZ DAC, if , it can be shown (by proceeding along the lines of [11]) that the RMS in-band noise due to sinusoidal jitter is white and has an RMS value given by...
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