A 0.18-μμ\mu m current-mode asynchronous sigma-delta modulator design

Balkir KAYAALTI; Ömer CERİD; Günhan DÜNDAR

Article Details

A 0.18-μμ\mu m current-mode asynchronous sigma-delta modulator design

Authors:

Balkir KAYAALTI | Ömer CERİD | Günhan DÜNDAR

Publisher:

TUBITAK

Journal:

Turkish Journal of Electrical Engineering and Computer Science 2016 Vol.24 Issue 6, pp.4569-4581

Document Type:

Article

Publication Date:

11/2016

Document Language:

Turkish

Document ID (Org No.):

2000741294

Frequency:

Bimonthly

eISSN:

1303-6203

pISSN:

1300-0632

Abstract:

 

In this study a first-order asynchronous current-mode sigma-delta modulator   has been designed and simulated. Asynchronous sigma-delta modulators   eliminate the continuous time sigma-delta modulator's problem of   signal-to-noise ratio degradation due to clock jitter by avoiding the use of   sampling in the modulator loop. Moreover, they provide a higher   signal-to-noise ratio even with low-order filters. Thus, considerably low   power consumption can be achieved with fewer circuit components. The current   mode enables designers to scale the circuits according to different supply   voltages and operating currents. In this work, design steps for an   asynchronous sigma-delta modulator have been given taking into account its   ideal mathematical model. Novel current comparator architecture is proposed,   which is used as a one bit-quantizer. Its working principles are explained.   The comparator's operation is verified by the simulations in the   asynchronous sigma-delta loop. Simulation results show that a satisfactory   performance can be obtained with relatively simple designs, compared to   ordinary synchronous continuous time sigma-delta modulators.

Article Details

A 0.18-μμ\mu m current-mode asynchronous sigma-delta modulator design

Authors: Balkir KAYAALTI | Ömer CERİD | Günhan DÜNDAR

Publisher: TUBITAK

Journal: Turkish Journal of Electrical Engineering and Computer Science 2016 Vol.24 Issue 6, pp.4569-4581

Document Type: Article

Publication Date: 11/2016

Document Language: Turkish

Document ID (Org No.): 2000741294

Frequency: Bimonthly

eISSN: 1303-6203

pISSN: 1300-0632

Issues

Authors:

Balkir KAYAALTI | Ömer CERİD | Günhan DÜNDAR

Publisher:

TUBITAK

Journal:

Turkish Journal of Electrical Engineering and Computer Science 2016 Vol.24 Issue 6, pp.4569-4581

Document Type:

Article

Publication Date:

11/2016

Document Language:

Turkish

Document ID (Org No.):

2000741294

Frequency:

Bimonthly

eISSN:

1303-6203

pISSN:

1300-0632