RS232 Interface Scavenges Energy For Connected Devices

RS232 Interface Scavenges Energy For Connected Devices

To convert the microcontroller's returning logic-level signal (TIN) to an RS232 signal, a non-inverting, tri-state output buffer (U2) and a pull-up resistor first expand the signal's voltage to range from GND to VPOS. Transistor Q2, a P-type enhancement MOSFET, then inverts and expands thi...

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Veröffentlicht in:Electronic Design 2010-09, Vol.58 (11), p.67-68
1. Verfasser: Lyon, Geoff M
Format: Magazinearticle
Sprache:eng
Schlagworte:
Buffers
Design specifications
Devices
Diodes
Electric potential
Electronics
Embedded systems
Integrated circuits
MOSFETs
Product development
Resistors
Semiconductor devices
Transistors
Voltage
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Zusammenfassung:To convert the microcontroller's returning logic-level signal (TIN) to an RS232 signal, a non-inverting, tri-state output buffer (U2) and a pull-up resistor first expand the signal's voltage to range from GND to VPOS. Transistor Q2, a P-type enhancement MOSFET, then inverts and expands this intermediate signal to an output signal (RXD) that ranges between VNEG and VPOS.
ISSN:0013-4872
1944-9550