■ Seng-Pan U, R. P. Martins, J.E.Franca, "High-Frequency Low-Power Multirate SC Realizations For NTSC/PAL Digital Video Filtering", IEEE International Symposium on Circuits and Systems (ISCAS), vol. 1, pp. 204-207, May-2001.

■ Seng-Pan U, R. P. Martins, J.E.Franca, "Experimental Results of SC Fractional Multirate Converters with Intermittent Polyphase Structures", in Proc. of the First Portugal-China Workshop on Solid-State Circuits, pp. 28-29, Oct-2000.

■ Seng-Pan U, R. P. Martins, J.E.Franca, "A linear-phase halfband SC video interpolation filter with coefficient-sharing and spread-reduction", IEEE International Symposium on Circuits and Systems (ISCAS), vol. 3, pp. 177-180, May-2000.

■ Seng-Pan U, Neves, R., R. P. Martins, J.E.Franca, "A 120 MHz SC 4th-Order Elliptic Interpolation Filter with Accurate Gain and Offset Compensation for Direct Digital Frequency Synthesizer", The First IEEE Asia-Pacific Conference on ASICs (AP-ASIC’99), pp. 1-4, Aug-1999.

■ Seng-Pan U, R. P. Martins, J.E.Franca, "High Performance Multirate SC Circuits with Predictive Correlated Double Sampling Technique", in Proc. of IEEE International Symposium on Circuits and Systems (ISCAS), Vol. 2, pp 77-80, May-1999.

■ Seng-Pan U, R. P. Martins, J.E.Franca, "Highly Accurate Mismatch-Free SC Delay Circuits with Reduced Finite Gain and Offset Sensitivity", in Proc. of IEEE International Symposium on Circuits and Systems (ISCAS), Vol. 2, pp 57-60, May-1999.

■ Seng-Pan U, R. P. Martins, J.E.Franca, "A Novel Half-Band SC Architecture for Effective Analog Impulse Sampled Interpolation", in Proc. of IEEE International Conference on Electronics, Circuits and Systems (ICECS), vol.1, pp 389-393, Sep-1998.

■ Seng-Pan U, "A Novel Impulse Sampled Interpolation Technique for Efficient and Accurate Analog Multirate Signal Processing", in Proc. of The 3rd China Association for Science and Technology (CAST) Conference of Young Scientists, , Aug-1998.

■ Seng-Pan U, R. P. Martins, J.E.Franca, "Impulse sampled intermittent polyphase SC FIR rational decimators with double-sampling", in Proc. of IEEE Midwest Symposium on Circuits and Systems, Vol. 2, pp 977-980, Aug-1997.

■ Seng-Pan U, R. P. Martins, J.E.Franca, "Intermittent Polyphase SC Structures for FIR Rational Interpolation", in Proc. of IEEE International Symposium on Circuits and Systems 1997 (ISCAS), Vol. 1, pp 121-124, Jun-1997.