MMIMan Machine InterfaceGUIGraphic User Interface 6 DC error

MMI(Man Machine Interface)/GUI(Graphic User Interface) 예 메카트로닉스공학부 6 전자회로 기초및 실습

차동증폭기 DC error • V 1 err = (RB 1 - RB 2)Iin(bias) • V 2 err = (RB 1 + RB 2)Iin(off)/2 • V 3 err = Vin(off) • Verror = AV(V 1 err + V 2 err +V 3 err) • V 1 err eliminated with equal base resistors • V 2 err reduced with smaller base resistors • V 3 err reduced with premium op amps 메카트로닉스공학부 25 전자회로 기초및 실습

공통신호제거비 (Common Mode Rejection Ratio: CMRR) • The higher the CMRR, the better • A typical op amp has CMRRdb = 90 d. B • Much interference is common-mode and a high CMRR means an amplifier will be effective in rejecting interference 메카트로닉스공학부 27 전자회로 기초및 실습

집적회로(Integrated circuits: IC) • Monolithic are complete circuit functions on a single chip • Examples of monolithic ICs include: amps, voltage regulators, and computer circuits • For high-power applications, thin-film, thick-film, and hybrid ICs are used 메카트로닉스공학부 28 전자회로 기초및 실습

집적회로(Integrated circuits: IC) • SSI refers to fewer than 12 components • MSI refers to between 12 and 100 components • LSI – more than 100 components • VLSI – more than 1000 components • ULSI – more than 1 million components 메카트로닉스공학부 29 전자회로 기초및 실습

전류미러(Current mirror) • Convenient method to create current sources and active loads • Higher CMRR +VCC IR = VCC - VBE R R IC = I R Compensating diode 메카트로닉스공학부 30 전자회로 기초및 실습

In ICs, a current mirror sources the tail current IC = 공통신호 전압이득: AV(CM) = RC VCC + VEE - VBE R 단일출력 차동 전압이득: AV = 2 RE RC 2 r`e 공통신호 제거비: CMRR = 메카트로닉스공학부 Av AV(CM) = RE r`e 31 = Zcurrent source re ’ 전자회로 기초및 실습