Chapter 6 Differential and+日Multistage Amplifiers1896Introduction6.1 The BJT differntial pair6.2Small-signal operationof theBJTdifferential amplifie6.3Othernonidealcharacteristicsofthedifferentialamplifier6.4MOS diffenrential amplifiers6.5Biasing in intergrated circuits6.6TheBJT differential amplifierwithactiveload6.9MultistageamplifiersMicroelectronicCircuits
Microelectronic Circuits Chapter 6 Differential and Multistage Amplifiers Introduction 6.1 The BJT differntial pair 6.2 Small-signal operation of the BJT differential amplifier 6.3 Other nonideal characteristics of the differential amplifier 6.4 MOS diffenrential amplifiers 6.5 Biasing in intergrated circuits 6.6 The BJT differential amplifier with active load 6.9 Multistage amplifiers
Introduction> The differential amplifier(pair) configuration is themost widely usedbuilding block in analogIC design.VClUC?BJT differential amplifieris the basis of a very-OOhigh-speedlogic circuitfamily, called emitter-UBUB2Ecoupled logic (ECL),Why?Microelectronic Circuits
Microelectronic Circuits Introduction ➢ The differential amplifier (pair) configuration is the most widely used building block in analog IC design. ➢ BJT differential amplifier is the basis of a veryhigh-speed logic circuit family, called emittercoupled logic (ECL). Why?
Reasons:uo++直接耦合u,=0uo放大电路.-(b)(a)Direct coupling between signal source and amplifierwill easily cause temperature Drift (zero drift)What shall we do?MicroelectronicCircuits
Microelectronic Circuits Reasons: Direct coupling between signal source and amplifier will easily cause temperature Drift (zero drift). What shall we do?
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Microelectronic Circuits
Advantages There are 2 reasons for using differentialin preference to single-ended amplifiers(1) Differential circuits are much less sensitive to noiseand interference than single-ended circuits.(2) It enables us to bias the amplifier and to coupleamplifier stage without the need of bypass andcoupling capacitors which are impossible tofabricate economically by IC technologyMicroelectronicCircuits
Microelectronic Circuits Advantages ➢ There are 2 reasons for using differential in preference to single-ended amplifiers. (1) Differential circuits are much less sensitive to noise and interference than single-ended circuits. (2) It enables us to bias the amplifier and to couple amplifier stage without the need of bypass and coupling capacitors which are impossible to fabricate economically by IC technology