二阶/spl δ //spl σ /调制器采用AlGaAs/GaAs HBTS

Proceedings of 1994 IEEE GaAs IC Symposium Pub Date : 1994-10-16 DOI:10.1109/GAAS.1994.636974

K. Nary, S. Beccue, R. Nubling, R. Pierson, Keh-Chung Wang, P. Zampardi, A. Jayaraman

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引用次数: 3

摘要

我们已经成功地在50 GHz (F/sub / t/) AlGaAs/GaAs异质结双极晶体管工艺中演示了一位二阶delta-sigma调制器。该集成调制器由低通单比特调制器、时钟发生器和输出缓冲器组成，在2 g /s的采样率下，过采样比为20，信噪比为37 dB。电路功耗为1.92 W。据我们所知，这些是首次报道的HBT δ σ调制器。

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Second order /spl Delta//spl Sigma/ modulators using AlGaAs/GaAs HBTS

We have successfully demonstrated one-bit, second-order delta-sigma modulators in a 50 GHz (F/sub t/) AlGaAs/GaAs heterojunction bipolar transistor process. The integrated modulator, consisting of a low-pass single bit modulator, clock generators and output buffers, has attained an SNR of 37 dB at a sample rate of 2 Gs/s for an oversampling ratio of 20. The circuit dissipates 1.92 W. To our knowledge, these are the first reported HBT delta sigma modulators.

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Proceedings of 1994 IEEE GaAs IC Symposium

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