A UWB-IR Transmitter With Digitally Controlled Pulse Generator

• Published in: IEEE journal of solid-state circuits 2007-06, Vol.42 (6), p.1300-1309
• Main Authors: Norimatsu, T., Fujiwara, R., Kokubo, M., Miyazaki, M., Maeki, A., Ogata, Y., Kobayashi, S., Koshizuka, N., Sakamura, K.
• Format: Article
• Language: English
• Subjects: Applied sciences; Architecture; Circuit properties; Circuits; CMOS; CMOS process; Design. Technologies. Operation analysis. Testing; Digital circuits; Digital control; Digital filters; Electric potential; Electric, optical and optoelectronic circuits; Electronic circuits; Electronics; Exact sciences and technology; Impulse radio; Integrated circuits; Oscillators, resonators, synthetizers; Power consumption; Power generation; Power measurement; Pulse generation; pulse generator; Pulse shape; Pulse shaping methods; Radio transmitters; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; sensor network; Shape control; Transmitters; Ultra wideband technology; ultra-wideband (UWB); Voltage
• ISSN: 0018-9200; 1558-173X
• DOI: 10.1109/JSSC.2007.897137

A novel transmitter for ultra-wideband (UWB) impulse radio has been developed. The proposed architecture enables low-power operation, simple design, and accurate pulse-shape generation. The phase and amplitude of the pulse are controlled separately and digitally to generate a desired pulse shape. This digital control method also contributes to the low-power transmission and eliminates the need for a filter. The transmitter is fabricated using a 0.18-mum CMOS process. The core chip size is only 0.40 mm 2 . From experimental measurements, it was found that the generated signal satisfied the FCC spectrum mask, and the average power dissipation was only 29.7 mW at A 2.2-V supply voltage. Therefore, the developed UWB transmitter generates accurate pulses with low power consumption and simple design architecture