A/D converter based on a new memory cell implemented using the switched current technique

Abstract This paper presents an A/D converter based on a Delta–Sigma Modulator implemented using the switched-current technique. The new memory cell was used as a basic component for the SI blocks. The design is a good example of a mixed analog–digital circuit, hence VHDL-AMS models were written to improve the design process. This work demonstrates the ability to use the VHDL-AMS models to simulate a complex switched-current circuit.

[1]  P. Sniatala,et al.  Properties of bilinear SI intergrators composed of a complementary memory cell , 1999 .

[2]  John B. Hughes,et al.  Switched-current cells for design automation , 1995, Proceedings of ISCAS'95 - International Symposium on Circuits and Systems.

[3]  John B. Hughes,et al.  Second generation switched-current signal processing , 1990, IEEE International Symposium on Circuits and Systems.

[4]  Robert Baraniecki,et al.  Oversampling ΣΔ Analog-to-Digital Converters Modeling Based on VHDL , 1998 .

[5]  G. Temes Delta-sigma data converters , 1994 .

[6]  Andrzej Handkiewicz,et al.  Low-voltage high-performance switched current memory cell , 1997, Proceedings. Tenth Annual IEEE International ASIC Conference and Exhibit (Cat. No.97TH8334).

[7]  Nianxiong Tan Switched-Current Design and Implementation of Oversampling A/D Converters , 1997 .

[8]  Gordon W. Roberts,et al.  Switched-current sigma-delta modulation for A/D conversion , 1992, [Proceedings] 1992 IEEE International Symposium on Circuits and Systems.

[9]  Andrzej Handkiewicz,et al.  Mixed-Signal Systems: A Guide to Cmos Circuit Design , 2002 .

[10]  John B. Hughes,et al.  Switched currents-a new technique for analog sampled-data signal processing , 1989, IEEE International Symposium on Circuits and Systems,.