A 14.6th-order 3.456GHz transmit baseband filter in 110nm CMOS for millimeter-wave communication systems

This paper presents a 1.728Gbps transmit baseband filter for transmitters of millimeter-wave communication systems. In order to avoid the inter symbol interference, ultra wide band and very high order filter is demanded. It is impracticable to realize such a high order filter with conventional analog technique, such as gm-C filter. The proposed filter consists of a 3.456GHz digital filter followed by an 8-bit 3.456Gsps digital to analog converter (DAC), which occupies 0.265mm2 in 110nm CMOS processes. It is difficult to adjust the clock and data delay at 3.456GHz. The DAC has a clock divider for the high speed operation. The new filter consumes 142mW and achieves the transmit spectrum very close to the mask regulated by IEEE802.15.3c.

[1]  H. Samavati,et al.  A 1.9-GHz Single-Chip CMOS PHS Cellphone , 2006, IEEE Journal of Solid-State Circuits.

[2]  M. Takamiya,et al.  A 100Mbps, 0.41mW, DC-960MHz band impulse UWB transceiver in 90nm CMOS , 2008, 2008 IEEE Symposium on VLSI Circuits.

[3]  Shin-Il Lim,et al.  A 6-bit 2.704Gsps DAC for DS-CDMA UWB , 2006, APCCAS 2006 - 2006 IEEE Asia Pacific Conference on Circuits and Systems.

[4]  Manolis Terrovitis,et al.  A 1.9GHz Single-Chip CMOS PHS Cellphone , 2006, 2006 IEEE International Solid State Circuits Conference - Digest of Technical Papers.

[5]  Sooping Saw,et al.  A CMOS 0.25-/spl mu/m continuous-time FIR filter with 125 ps per tap delay as a fractionally spaced receiver equalizer for 1-gb/s data transmission , 2005 .