For a type-3 Compensated error amplifier (fig.7-28a), determine the k-factor for a Scamp of 185. For...

   

Transcribed Image Text:

For a type-3 Compensated error amplifier (fig.7-28a), determine the k-factor for a Scamp of 185°. For a gain of 24dB at a cross-over frequency of 15KHZ, (Let 2₁ = 1K), determine the values at Ry, C1 g C₂, C3, and Rs. Type 3 Error Amplifier with Compensation The type 2 compensation circuit described previously is sometimes not capable of providing sufficient phase angle difference to meet the stability criterion of a 45° phase margin. Another compensation circuit, known as the type 3 amplifier, is shown in Fig. 7-28a. The type 3 amplifier provides an additional phase angle boost compared to the type 2 circuit and is used when an adequate phase margin is not achievable using the type 2 amplifier. The small-signal transfer function is expressed in terms of input and feed- back impedances Z, and Z v(s) G(S)=√(S) Z Z₁ Vat == (a) (b) Bode magnitude plot. (R₂ + 1/sC₁)||1/sC₂ R₁ || (R₂ + 1/sC₂) 0000 (b) (a) Type 3 compensated error amplifier; ve (7-88) For a type-3 Compensated error amplifier (fig.7-28a), determine the k-factor for a Scamp of 185°. For a gain of 24dB at a cross-over frequency of 15KHZ, (Let 2₁ = 1K), determine the values at Ry, C1 g C₂, C3, and Rs. Type 3 Error Amplifier with Compensation The type 2 compensation circuit described previously is sometimes not capable of providing sufficient phase angle difference to meet the stability criterion of a 45° phase margin. Another compensation circuit, known as the type 3 amplifier, is shown in Fig. 7-28a. The type 3 amplifier provides an additional phase angle boost compared to the type 2 circuit and is used when an adequate phase margin is not achievable using the type 2 amplifier. The small-signal transfer function is expressed in terms of input and feed- back impedances Z, and Z v(s) G(S)=√(S) Z Z₁ Vat == (a) (b) Bode magnitude plot. (R₂ + 1/sC₁)||1/sC₂ R₁ || (R₂ + 1/sC₂) 0000 (b) (a) Type 3 compensated error amplifier; ve (7-88)

Answer rating: 100% (QA)

To determine the Kfactor for a type3 compensated error amplifier ... View the full answer