A 4GHz 4th-Order Passive LC Bandpass Delta-Sigma Modulator with IF at 1.4GHz

Author

Luh, Louis ; Jensen, Joseph F. ; Lin, Cheng-Min ; Tsen, Chan-Tang ; Le, Dustin ; Cosand, Albert E. ; Thomas, Stephen ; Fields, Charles

Author_Institution

HRL Labs., LLC, Malibu, CA

fYear

0

fDate

0-0 0

Firstpage

168

Lastpage

169

Abstract

A 4th-order bandpass DeltaSigma modulator utilizes a novel passive LC continuous-time DeltaSigma architecture to achieve the high IF (pass band) frequency (1.4GHz). A 3-bit quantizer is used to improve wideband performance. A novel architecture of noise-shaped quantizer is used to noise shape the DAC mismatch without introducing extra loop delay. Eight 2nd-order LC modulators are used for noise shaping with minimal transistor count and power consumption. Implemented with 5195 InP HBT transistors, this modulator achieved 76dB SNR and 90dB dynamic range in 1 MHz bandwidth at 1.4GHz with a 4GHz sample rate

Keywords

band-pass filters; bipolar digital integrated circuits; delta-sigma modulation; microwave integrated circuits; passive networks; quantisation (signal); 1 MHz; 1.4 GHz; 3 bit; 4 GHz; DAC mismatch; HBT transistor; InP; LC modulator; bandpass delta-sigma modulator; noise shaping; noise-shaped quantizer; Delay; Delta modulation; Dynamic range; Energy consumption; Frequency; Heterojunction bipolar transistors; Indium phosphide; Noise shaping; Signal to noise ratio; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Circuits, 2006. Digest of Technical Papers. 2006 Symposium on

Conference_Location

Honolulu, HI

Print_ISBN

1-4244-0006-6

Type

conf

DOI

10.1109/VLSIC.2006.1705363

Filename

1705363