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Single-chip baseband waveform generator CMOS-LSI for quadrature-type GMSK modulator

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3 Author(s)
Suzuki, H. ; NTT Yokosuka Electrical Communication Laboratory, Yokosuka, Japan ; Yamao, Y. ; Momma, K.

A single-chip baseband waveform generator CMOS-LSI has been fabricated for use in the quadrature-type GMSK modulator, which is suitable for application to digital mobile communications. The LSI employs digital signal processing in realising such functions as Gaussian baseband filtering and phase integration. Digital/analogue convertors and auxiliary circuits, such as an internal-clock generator and carrier frequency adjuster, are also integrated onto the same chip. The LSI operates well below a bit rate of 110 Kbit/s when the power supply voltage is 5 V.

Published in:

Electronics Letters  (Volume:20 ,  Issue: 21 )