Journal of the Korean Institute of Telematics and Electronics (대한전자공학회논문지)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Design and Fabrication of a Seven Segment Decoder/Driver with PMOS Technology

PMOS 집적회로 제작기법을 사용한 Seven Segment Decoder/Driver의 설계와 제작

  • 김충기 (한국과학원 전기및 전자공학과) ;
  • 박형규 (한국과학원 전기및 전자공학과)
  • Published : 1978.07.01
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Abstract

A medium scale integrated circuit, BCD to seven segment decoder/driver is designed and fabricated by employing P-channel metal-oxide-semiconductor technology. The device configuration is specifically designed for a common cathode seven segment LED display unit. The decoder logic is composed of two serially connected read-only-memory matrices and the LED drivers are implemented with wide channel FET's. The fabricated integrated circuit performed successfully with a supply voltage between -7 Volt and -26 Volt and the non-uniformity of the LED segment current is about 10%.

Medium scale 집적회로인 BCD to seven segment decoder/driver를 P-channel Metal-Oxide-Semiconductor집적회로 제작 기법으로 설계, 제작하였다. 본 소자는 특별히 common cathode seven segment light emitting diode에 적합하도록 설계되었다. decoder logic은 직렬로 연결된 두 개의 Read-Only-Memory로 구성되어 있으며 driver로는 channel이 넓은 FET를 사용하였다. 제작된 집적회로는 전원 전압이 -7 volt에서 -26 volt까지 변화할 때 정상적으로 동작하였으며 LED각 segment 전류의 non-uniformity는 약 ±10%이었다.

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