A dual slope based pulse position modulation circuit for sub-GHz IR-UWB systems

Author

Shenoy, Varun ; Kalkura, Prasanna ; Jung, Sungyong ; Lu, Mingyu ; Gao, Jean ; Lee, Sung Chul

Author_Institution

Dept. of Electr. Eng., Univ. of Texas at Arlington, Arlington, TX

fYear

2008

fDate

10-13 Aug. 2008

Firstpage

846

Lastpage

849

Abstract

A pulse position modulation circuit for IR-UWB communication systems suitable for CMOS integration is proposed. The PN code representing the pulse position is converted into a corresponding analog voltage and compared with the outputs of two precision ramp generator circuits. The ramp generators employ a negative feedback principle making their output robust against environmental and process variations in order to reduce jitter. The circuit also features a time-interleaved architecture to ease constraints on devices such as the DAC and integrator circuits. The circuit has been designed and fabricated in AMI 0.5 mum CMOS technology.

Keywords

CMOS integrated circuits; feedback; jitter; pseudonoise codes; pulse position modulation; ramp generators; ultra wideband communication; CMOS integration; CMOS technology; DAC; IR-UWB communication systems; IR-UWB systems; PN code; analog voltage; dual slope based pulse position modulation circuit; integrator circuits; jitter; negative feedback principle; ramp generator circuits; size 0.5 micron; time-interleaved architecture; CMOS technology; Delay; Jitter; Negative feedback; Pulse circuits; Pulse generation; Pulse modulation; Signal generators; Threshold voltage; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2008. MWSCAS 2008. 51st Midwest Symposium on

Conference_Location

Knoxville, TN

ISSN

1548-3746

Print_ISBN

978-1-4244-2166-4

Electronic_ISBN

1548-3746

Type

conf

DOI

10.1109/MWSCAS.2008.4616932

Filename

4616932