Title :
Frequency synthesizer for on-chip testing and automated tuning
Author :
Valero-López, Ari Y. ; Valdes-Garcia, Alberto ; Sánchez-Sinencio, Edgar
Author_Institution :
Analog & Mixed-Signal Center, Texas A&M Univ., USA
Abstract :
This paper presents a compact, phase-locked loop (PLL) based, frequency synthesizer suitable for built-in testing and automatic tuning applications operating in the 100 MHz frequency range. Key features of this design include a differential charge pump with common mode feedback (CMFB) and a voltage controlled oscillator (VCO) based on a pseudo-differential OTA with a linear transconductance control and tuning invariant output resistance. Experimental results from an integrated prototype fabricated using standard 0.35 μm CMOS technology are presented. The measured HD3 of the output signal is better than -39 dB over 80% of the tuning range: 40-160 MHz. The circuit occupies a silicon area of 200×1000 μm2 and operates from a 3.3 V power supply.
Keywords :
CMOS integrated circuits; built-in self test; circuit feedback; circuit tuning; frequency synthesizers; integrated circuit testing; operational amplifiers; phase locked loops; silicon; system-on-chip; voltage-controlled oscillators; 0.35 micron; 3.3 V; 40 to 160 MHz; CMOS technology; PLL based frequency synthesizer; Si; VCO; automated tuning; built-in testing; charge pump; common mode feedback; integrated prototype fabrication; invariant output resistance; linear transconductance control; on-chip testing; phase locked loop; pseudo-differential OTA; silicon; voltage controlled oscillator; Automatic testing; CMOS technology; Charge pumps; Circuit optimization; Frequency synthesizers; Output feedback; Phase locked loops; Transconductance; Tuning; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
DOI :
10.1109/ISCAS.2004.1329066
