The Design of CMOS Infrared Remote-control Receivers with Data Rates of 38kbit/s to 10Mbit/s

Autor: Tung-Ying Chiang, 江東穎
Rok vydání: 2001
Druh dokumentu: 學位論文 ; thesis
Popis: 89
In this thesis, A CMOS infrared remote-control receiver is designed to receive infrared signals generated from a PIN-diode with the carrier-frequency transmission. The receiver includes the input stage, the limiting amplifier, the bandpass filter, the comparator stage, and the demodulator stage. The carrier frequencies are designed in 38KHz and 10MHz, therefore the maximum available data rates are 38kbit/s and 10Mbit/s, respectively. The CMOS receiver is designed to be compatible with NJL51H/V000-series receivers. The minimum detectable signal current is 0.5nA with 1uA background DC current signal. In the designed receiver, the input stage is used to read out IR current signal which is of amplitude-shift-keying (ASK) modulation type, pre-amplify it, and convert current signal into voltage signal. The limiting amplifier further amplifies the signal and limits it to a suitable range to avoid the saturation. Then the signal enter the bandpass filter which perform the frequency selection to reject other undesired signals. Due to contrived mismatch between MOS dimension, the bandpass filter provides a gap between DC level of outputs. The comparator receives the signal from bandpass filter and future converts signal into a digital signal. Then the demodulator demodulates the digital signal to obtain the output data. The designed infrared remote-control receivers have data rates of 38kbit/s to 10Mbit/s. The designed infrared remote-control receiver with the data rate of 38kbit/s is fabricated by 0.5um Double-Poly-Double-Metal(DPDM) n-well CMOS technology. The fabricated chip has been measured. The measured minimum detectable current is 30nA with the data rate of 38kbit/s and the measured power consumption is 2.21mW in 4.44V power supply. It is found the decreased input signal sensitivity is mainly due to the flicker noise of MOSFET which is amplified at the output. In the future, further researches on the design of CMOS infrared remote-control receivers with low noise, low power dissipation, and automatic-gain controller capability will be done to improve the performance.
Databáze: Networked Digital Library of Theses & Dissertations
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