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CS3002-IS 数据表(PDF) 10 Page - Cirrus Logic |
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CS3002-IS 数据表(HTML) 10 Page - Cirrus Logic |
10 / 16 page CS3001 CS3002 10 DS490F8 The feedback capacitor C2 is required for closed- loop gains greater than 50 V/V. The capacitor in- troduces a pole and a zero in the loop gain transfer function, This indicates that the separation of the pole and the zero is governed by the closed loop gain. It is required that the zero falls on the steep slope (–100 dB/decade) of the loop gain plot so that there is some gain higher than 0 dB (typically 20 dB) at the hand-over frequency (the frequency at which the slope changes from – 100 dB/decade to –20 dB/decade). 50 pF 50 pF R1 R2 Vin Vo C2 Cin Cin Choose C2 so that R2 • C2 ≥ ? R1 • Cin Figure 17. Non-inverting Gain Configuration with Compensation T 1 s z 1 ----- + ⎝⎠ ⎛⎞ – 1 s p 1 ----- + ⎝⎠ ⎛⎞ -----------------------A ol = P 1 1 2 π R 1 R 2 || ()C 2 ------------------------------------- 1 2 π R 1C2 () ------------------------- ≅ =for R 2 R 1 » Z 1 1 2 π AR 1 × ()C 2 ----------------------------------- =where A R 2 R 1 ------ = Z 1 1 2 π R 2 ()C 2 ------------------------- = |
类似零件编号 - CS3002-IS |
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类似说明 - CS3002-IS |
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