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LC7527E Scheda tecnica(PDF) 9 Page - Sanyo Semicon Device |
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LC7527E Scheda tecnica(HTML) 9 Page - Sanyo Semicon Device |
9 / 11 page External Component Value Calculations The external capacitors required for each band in the LC7527E are the structural elements in semiconductor inductors (simulated inductors). The remainder of this section presents the equivalent circuits and the formulas used to determine the center frequencies. 1. Semiconductor Inductor Equivalent Circuit The LC7527E provides circuits with differing constants for the low and high bands. 2. Calculation Example Specifications: 1) Center frequency: Fo = 63 Hz 2) Q at maximum boost: Q+12 dB = 1.05 • Derive the sharpness Qo of the semiconductor inductor itself. Qo = × Q +12 dB ≈ 4.064 See the internal equivalent circuit figure for R4. • Derive C1. C1 = 1/2 πFoR1Qo ≠ 0.953 (µF) • Derive C2. C2 = Qo/2 πFoR2 ≠ 0.034 (µF) 3. Sample Values for C1 and C2 (R1 + R4) R1 No. 4466-9/11 LC7527E Center C1 C2 frequency (F) (F) Fo (Hz) 63 0.953 µ 0.034 µ 160 0.377 µ 0.014 µ 400 0.151 µ 5390 p 1000 0.060 µ 2156 p 2500 0.024 µ 862 p 6300 9563 p 3422 p 16000 3765 p 1348 p |
Codice articolo simile - LC7527E |
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Descrizione simile - LC7527E |
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