Design of continuous time feed forward quadrature Modulator for multi-standard receivers

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SHAMSI ALIREZA

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Journal: ELECTRONIC INDUSTRIES Year:2019 | Volume:10 | Issue:1 Page(s): 73-84

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Information Journal Paper

Title

Design of continuous time feed forward quadrature Modulator for multi-standard receivers

Author(s)

SHAMSI ALIREZA | Issue Writer Certificate

Keywords

quadrature delta sigma modulatorQ1

multi standardQ1

WLANQ1

WCDMAQ1

GSMQ1

complex DACQ1

Abstract

In this paper, a continuous-time (CT) third order multi standard low pass (LP) quadrature delta sigma modulator (QDSM) for low-IF receiver is designed. The proposed modulator is capable of supporting WLAN / WCDMA / GSM standards receivers at two real and quadrature mode. The adder Op-Amps at the end of the loop filter are eliminated to reduce the power consumption. This modulator is employed in real mode and single bit quantizer in GSM standard. To achieve the required bandwidth and SNR is worked in multi-bit quadrature mode in WLAN / WCDMA standards. The complex DAC (C_DAC) is designed to eliminate the mismatch between I and Q paths. This modulator is Implemented in 180 nm CMOS technology, and SNRs at transistor level are 54/ 75. 9 / 81. 63, and FOMs are 0. 828 / 0. 485 / 1. 63 (pj / conv), for WLAN / WCDMA / GSM modes, respectively. The new structure has a better FOM at the WLAN / WCDMA operating modes compared to similar cases.

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APA: Copy

SHAMSI, ALIREZA. (2019). Design of continuous time feed forward quadrature Modulator for multi-standard receivers. ELECTRONIC INDUSTRIES, 10(1 ), 73-84. SID. https://sid.ir/paper/229680/en

Vancouver: Copy

SHAMSI ALIREZA. Design of continuous time feed forward quadrature Modulator for multi-standard receivers. ELECTRONIC INDUSTRIES[Internet]. 2019;10(1 ):73-84. Available from: https://sid.ir/paper/229680/en

IEEE: Copy

ALIREZA SHAMSI, “Design of continuous time feed forward quadrature Modulator for multi-standard receivers,” ELECTRONIC INDUSTRIES, vol. 10, no. 1 , pp. 73–84, 2019, [Online]. Available: https://sid.ir/paper/229680/en

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