Abstract
This paper introduces a novel electronic system for simplex low-bitrate infra-red (IR) communication applications. The transmitter is implemented completely by analog building blocks, formed with the help of a recently fabricated chip that includes active elements allowing various modular interconnections. For the design of this chip, the ON Semiconductor C035 0.35μm I3T25 technology was chosen due to the trade-off between cost, efficiency and obtainable parameters. The designed transmitter operates as a voltageto-duty cycle converter, using pulse width modulation that causes ON/OFF keying of the carrier signal for infra-red (IR) diode. The duty cycle variable between 7% and 83% is modulated by the input voltage (in the range of ±0.8 V) of the transmitter. The use case of the proposed concept in the measurement of illuminance within the range of 30 lx and 550 lx is also presented. The quality of the transmission was evaluated as the error between the transmitted and received values of the duty cycle (kept mostly below 10 %). The maximal power consumption of the transmitter reaches 180 mW.
Highlights
In the field of satellite [1], optical [2] and terrestrial communication systems [2]–[4], achieving a reliable connection over long distances and overcoming high signal attenuation are among the main requirements in the planning of these wireless communication links
The duty cycle duty cycle of vPWM voltage (DPWM) was varied by these values of illuminance in the range from 15% up to 90% while the received Drec was sensed in range from 27% up to 88% (see Fig. 19(a))
The majority of active elements required for the proposed concept was realized using AEs developed recently in I3T 0.35 μm CMOS process [16]
Summary
In the field of satellite [1], optical [2] and terrestrial communication systems [2]–[4], achieving a reliable connection over long distances and overcoming high signal attenuation are among the main requirements in the planning of these wireless communication links. In such use cases, a short distance communication link with low bitrate (kbps) as well as low power consumption (less than 1 W) is sufficient and it is usually a better solution than the standard discrete one (usually requiring more than 1 W). Linear voltage processing is limited due to the very low power supply voltage of the active elements (±1.65 V), 3) to design a compact and simple transmitter using recently introduced CMOS integrated building blocks [16] because of its low complexity and power consumption and, 4) to realize measurements in real environment (plant aquarium in our case) in order to verify functionality of the proposed concept. By a brief explanation of the principles of relevant active elements (AEs) required for the design of the system
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
