IEICE Electronics Express
Online ISSN : 1349-2543
Tunable continuous-time ΔΣ modulator for switching power amplifier
Kwangchun LeeBonghyuk ParkSeunghyun JangJaeho JungKyoungrok Cho
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Keywords: BPDSM, BiCMOS, LTE, Class-S, resonator
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2012 Volume 9 Issue 22 Pages 1714-1719

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Abstract

A fully integrated tunable 4th-order multi-feedback bandpass delta-sigma modulator (BPDSM) fabricated in 0.25um SiGe BiCMOS is presented. The input frequency can be tuned from 945MHz to 988MHz at 2.4GHz fixed clock frequency. This modulator dissipates 110mA from 3.3V power supply. The peak signal-to-noise-ratio (SNR) of sinewave input is 41.1dB in 10MHz bandwidth and error vector magnitude (EVM) of 64QAM long term evolution (LTE) downlink is 3.16%, 3.59%, and 3.65% at different carrier frequencies.

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© 2012 by The Institute of Electronics, Information and Communication Engineers
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