On-Chip Single Tone Pseudo-Noise Generator for Analog IP Noise Tolerance Measurement

Masaaki SODA  Yoji BANDO  Satoshi TAKAYA  Toru OHKAWA  Toshiharu TAKARAMOTO  Toshio YAMADA  Shigetaka KUMASHIRO  Tohru MOGAMI  Makoto NAGATA  

IEICE TRANSACTIONS on Electronics   Vol.E94-C   No.6   pp.1024-1031
Publication Date: 2011/06/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E94.C.1024
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies)
noise,  sine wave,  harmonic,  

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A single tone pseudo-noise generator with a harmonic-eliminated waveform is proposed for measuring noise tolerance of analog IPs. In the waveform, the harmonics up to the thirteenth are eliminated by combining seven rectangular waves with 22.5-degree spacing phases. The proposed waveform includes only high region frequency harmonic components, which are easily suppressed by a low-order filter. This characteristic enables simple circuit implementation for a sine wave generator. In the circuit, the harmonic eliminated waveform generator is combined with a current controlled oscillator and a frequency adjustment circuit. The single tone pseudo-noise generator can generate power line noise from 20 MHz to 220 MHz with 1 MHz steps. The SFDR of 40 dB is obtained at the noise frequency of 100 MHz. The circuit enables the measurement of frequency response characteristics measurements such as PSRR.