1. Chapter 5 Differential and Multistage Amplifier

5. The MOS Differential Pair

6. Operation with a Common –Mode Input Voltage

12. Large-Signal Operation The linear range of operation of the MOS differential pair can be extended by operating the transistor at a higher value of V OV .

15. Differential Gain Signal voltage at the joint source connection must be zero.

16. Differential Gain An alternative way of looking at the small-signal operation of the circuit .

18. Differential Gain MOS differential amplifier with r o and R SS taken into account.

21. Common-Mode Gain The MOS differential amplifier with a common-mode input signal v icm .

29. The BJT Differential Pair The basic BJT differential-pair configuration.

34. Large-Signal Operation

36. Large-Signal Operation The transfer characteristics of the BJT differential pair (a) can be linearized by including resistances in the emitters.

37. Small Signal Operation The currents and voltages in the differential amplifier when a small differential input signal v id is applied.

38. Small Signal Operation A simple technique for determining the signal currents in a differential amplifier excited by a differential voltage signal v id ; dc quantities are not shown.

46. Common-Mode Gain The differential amplifier fed by a common-mode voltage signal v icm .

47. Common-Mode Gain Equivalent “half-circuits” for common-mode calculations.

52. Example

55. Differential-to-Single-Ended Conversion A simple but inefficient approach for differential to single-ended conversion.

56. The Active-Loaded MOS Differential Pair The active-loaded MOS differential pair.

57. The Active-Loaded MOS Differential Pair The circuit at equilibrium assuming perfect matching.

58. The Active-Loaded MOS Differential Pair The circuit with a differential input signal applied, neglecting the r o of all transistors.

60. Short-Circuit Transconductance Determining the short-circuit transconductance G m = i o / v id

61. Short-Circuit Transconductance

62. Output Resistance Circuit for determining R o . The circled numbers indicate the order of the analysis steps.

67. The Bipolar Differential Pair with Active Load Active-loaded bipolar differential pair.

68. Determine the Transconductance

69. Determine the output Resistance

73. Frequency Response of the Resistively Loaded MOS Amplifier (b) Differential half-circuit. (c) Common-mode half-circuit.

74. Frequency Response of the Resistively Loaded MOS Amplifier common-mode gain

75. Frequency Response of the Resistively Loaded MOS Amplifier Differential Gain

76. Frequency Response of the Resistively Loaded MOS Amplifier CMRR with frequency.

78. Multistage Amplifier

81. Multistage Amplifier Equivalent circuit for calculating the gain of the input stage of the example. Input differential resistance Gain of first stage

82. Multistage Amplifier Equivalent circuit for calculating the gain of the second stage of the example. Gain of second stage

83. Multistage Amplifier Equivalent circuit for calculating the gain of the third stage of the example. Gain of third stage

84. Multistage Amplifier Equivalent circuit for calculating the gain of the output stage of the example. Gain of output stage Output resistance

85. Two-Stage CMOS Op-Amp Configuration