741 opamp pole/zero analysis - sharifee.sharif.edu/~elec_analog-alif/hw/fotowat/u741.pdf ·...

741 OPAMP POLE/ZERO ANALYSIS Analog Electronics Winter 1390 | SUT25761 Siavash Kananian ©

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741 OPAMP POLE/ZERO

ANALYSIS

Analog Electronics Winter 1390 | SUT25761

Siavash Kananian ©

Page 2: 741 OPAMP POLE/ZERO ANALYSIS - Sharifee.sharif.edu/~elec_analog-AliF/hw/Fotowat/u741.pdf · Parasitic capacitance between nodes 5 & 6 A 13pF cap. is placed between nodes 5 & 6 Siavash

u741schematic

Siavash Kananian ©

Page 3: 741 OPAMP POLE/ZERO ANALYSIS - Sharifee.sharif.edu/~elec_analog-AliF/hw/Fotowat/u741.pdf · Parasitic capacitance between nodes 5 & 6 A 13pF cap. is placed between nodes 5 & 6 Siavash

Simplified, Conceptual Schematic

Diagram of the 741 Op Amp

Siavash Kananian ©

Page 4: 741 OPAMP POLE/ZERO ANALYSIS - Sharifee.sharif.edu/~elec_analog-AliF/hw/Fotowat/u741.pdf · Parasitic capacitance between nodes 5 & 6 A 13pF cap. is placed between nodes 5 & 6 Siavash

Multicollector Lateral PNP

Siavash Kananian ©

Page 5: 741 OPAMP POLE/ZERO ANALYSIS - Sharifee.sharif.edu/~elec_analog-AliF/hw/Fotowat/u741.pdf · Parasitic capacitance between nodes 5 & 6 A 13pF cap. is placed between nodes 5 & 6 Siavash

Simplified Schematic of the 741 Op

Amp with Idealized Biasing

Siavash Kananian ©

Page 6: 741 OPAMP POLE/ZERO ANALYSIS - Sharifee.sharif.edu/~elec_analog-AliF/hw/Fotowat/u741.pdf · Parasitic capacitance between nodes 5 & 6 A 13pF cap. is placed between nodes 5 & 6 Siavash

Bias circuitry

Siavash Kananian ©

Page 7: 741 OPAMP POLE/ZERO ANALYSIS - Sharifee.sharif.edu/~elec_analog-AliF/hw/Fotowat/u741.pdf · Parasitic capacitance between nodes 5 & 6 A 13pF cap. is placed between nodes 5 & 6 Siavash

Input Stage Biasing of the 741 Op Amp

Siavash Kananian ©

Page 8: 741 OPAMP POLE/ZERO ANALYSIS - Sharifee.sharif.edu/~elec_analog-AliF/hw/Fotowat/u741.pdf · Parasitic capacitance between nodes 5 & 6 A 13pF cap. is placed between nodes 5 & 6 Siavash

Darlington Gain Stage Biasing

Siavash Kananian ©

Page 9: 741 OPAMP POLE/ZERO ANALYSIS - Sharifee.sharif.edu/~elec_analog-AliF/hw/Fotowat/u741.pdf · Parasitic capacitance between nodes 5 & 6 A 13pF cap. is placed between nodes 5 & 6 Siavash

Output Stage Biasing of the 741 Op Amp

Siavash Kananian ©

Page 10: 741 OPAMP POLE/ZERO ANALYSIS - Sharifee.sharif.edu/~elec_analog-AliF/hw/Fotowat/u741.pdf · Parasitic capacitance between nodes 5 & 6 A 13pF cap. is placed between nodes 5 & 6 Siavash

Siavash Kananian ©

Page 11: 741 OPAMP POLE/ZERO ANALYSIS - Sharifee.sharif.edu/~elec_analog-AliF/hw/Fotowat/u741.pdf · Parasitic capacitance between nodes 5 & 6 A 13pF cap. is placed between nodes 5 & 6 Siavash

Freq. Response

Siavash Kananian ©

Page 12: 741 OPAMP POLE/ZERO ANALYSIS - Sharifee.sharif.edu/~elec_analog-AliF/hw/Fotowat/u741.pdf · Parasitic capacitance between nodes 5 & 6 A 13pF cap. is placed between nodes 5 & 6 Siavash

Pole @ node 14

A 30pF cap. Is shunted with node 14

Siavash Kananian ©

Parasitic capacitance between nodes 5 & 6

A 13pF cap. is placed between nodes 5 & 6

Siavash Kananian ©

Page 14: 741 OPAMP POLE/ZERO ANALYSIS - Sharifee.sharif.edu/~elec_analog-AliF/hw/Fotowat/u741.pdf · Parasitic capacitance between nodes 5 & 6 A 13pF cap. is placed between nodes 5 & 6 Siavash

Output From HSPICE

Siavash Kananian ©

Page 15: 741 OPAMP POLE/ZERO ANALYSIS - Sharifee.sharif.edu/~elec_analog-AliF/hw/Fotowat/u741.pdf · Parasitic capacitance between nodes 5 & 6 A 13pF cap. is placed between nodes 5 & 6 Siavash

Pole at node 7

A 10pF cap. is shunted with node 7.

Siavash Kananian ©

Page 16: 741 OPAMP POLE/ZERO ANALYSIS - Sharifee.sharif.edu/~elec_analog-AliF/hw/Fotowat/u741.pdf · Parasitic capacitance between nodes 5 & 6 A 13pF cap. is placed between nodes 5 & 6 Siavash

Pole @ node 9

A 100pF cap. is shunted with node 9

Siavash Kananian ©

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