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Dept. of Biomed. Eng. BME207: Basic Electronic Circuits Kyung Hee Univ. http://www.ejwoo.com 101 Eung Je Woo Bipolar Junction Transistor (BJT) BJT as amplifier

Bipolar Junction Transistor (BJT) - ejwoo.com · Dept. of Biomed. Eng. BME207: Basic Electronic Circuits Kyung Hee Univ. 10‐2 Eung Je Woo BJT as switch

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Page 1: Bipolar Junction Transistor (BJT) - ejwoo.com · Dept. of Biomed. Eng. BME207: Basic Electronic Circuits Kyung Hee Univ.  10‐2 Eung Je Woo BJT as switch

Dept. of Biomed. Eng.  BME207: Basic Electronic Circuits  Kyung Hee Univ. 

http://www.ejwoo.com    10‐1  Eung Je Woo 

Bipolar Junction Transistor (BJT)

BJT as amplifier

Page 2: Bipolar Junction Transistor (BJT) - ejwoo.com · Dept. of Biomed. Eng. BME207: Basic Electronic Circuits Kyung Hee Univ.  10‐2 Eung Je Woo BJT as switch

Dept. of Biomed. Eng.  BME207: Basic Electronic Circuits  Kyung Hee Univ. 

http://www.ejwoo.com    10‐2  Eung Je Woo 

BJT as switch

pnp and npn BJT

Structure and symbol

Current and voltage of three terminals (base, emitter and collector)

i-v characteristics

Cut-off region

Active linear region

Saturation region

Breakdown region

Page 3: Bipolar Junction Transistor (BJT) - ejwoo.com · Dept. of Biomed. Eng. BME207: Basic Electronic Circuits Kyung Hee Univ.  10‐2 Eung Je Woo BJT as switch

Dept. of Biomed. Eng.  BME207: Basic Electronic Circuits  Kyung Hee Univ. 

http://www.ejwoo.com    10‐3  Eung Je Woo 

Page 4: Bipolar Junction Transistor (BJT) - ejwoo.com · Dept. of Biomed. Eng. BME207: Basic Electronic Circuits Kyung Hee Univ.  10‐2 Eung Je Woo BJT as switch

Dept. of Biomed. Eng.  BME207: Basic Electronic Circuits  Kyung Hee Univ. 

http://www.ejwoo.com    10‐4  Eung Je Woo 

Page 5: Bipolar Junction Transistor (BJT) - ejwoo.com · Dept. of Biomed. Eng. BME207: Basic Electronic Circuits Kyung Hee Univ.  10‐2 Eung Je Woo BJT as switch

Dept. of Biomed. Eng.  BME207: Basic Electronic Circuits  Kyung Hee Univ. 

http://www.ejwoo.com    10‐5  Eung Je Woo 

Bias circuit analysis

Large signal model

Quiescent point (operating point) and load line

Page 6: Bipolar Junction Transistor (BJT) - ejwoo.com · Dept. of Biomed. Eng. BME207: Basic Electronic Circuits Kyung Hee Univ.  10‐2 Eung Je Woo BJT as switch

Dept. of Biomed. Eng.  BME207: Basic Electronic Circuits  Kyung Hee Univ. 

http://www.ejwoo.com    10‐6  Eung Je Woo 

Page 7: Bipolar Junction Transistor (BJT) - ejwoo.com · Dept. of Biomed. Eng. BME207: Basic Electronic Circuits Kyung Hee Univ.  10‐2 Eung Je Woo BJT as switch

Dept. of Biomed. Eng.  BME207: Basic Electronic Circuits  Kyung Hee Univ. 

http://www.ejwoo.com    10‐7  Eung Je Woo 

Small signal model and analysis

CE amplifier

CB amplifier

CC amplifier

Page 8: Bipolar Junction Transistor (BJT) - ejwoo.com · Dept. of Biomed. Eng. BME207: Basic Electronic Circuits Kyung Hee Univ.  10‐2 Eung Je Woo BJT as switch

Dept. of Biomed. Eng.  BME207: Basic Electronic Circuits  Kyung Hee Univ. 

http://www.ejwoo.com    10‐8  Eung Je Woo 

10_23.jpg

Page 9: Bipolar Junction Transistor (BJT) - ejwoo.com · Dept. of Biomed. Eng. BME207: Basic Electronic Circuits Kyung Hee Univ.  10‐2 Eung Je Woo BJT as switch

Dept. of Biomed. Eng.  BME207: Basic Electronic Circuits  Kyung Hee Univ. 

http://www.ejwoo.com    10‐9  Eung Je Woo 

Diode gate and BJT gate (TTL)