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CA3140AEZ Datasheet(PDF) 11 Page - Intersil Corporation |
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CA3140AEZ Datasheet(HTML) 11 Page - Intersil Corporation |
11 / 23 page 11 FN957.10 July 11, 2005 FIGURE 10A. CIRCUIT Top Trace: Output at junction of 2.7 Ω and 51Ω resistors; 5V/Div., 500ms/Div. Center Trace: External output of triangular function generator; 2V/Div., 500ms/Div. Bottom Trace: Output of “Log” generator; 10V/Div., 500ms/Div. FIGURE 10B. FIGURE FUNCTION GENERATOR SWEEPING 1V/Div., 1s/Div. Three tone test signals, highest frequency ≥0.5MHz. Note the slight asymmetry at the three second/cycle signal. This asymmetry is due to slightly different positive and negative integration from the CA3080A and from the PC board and component leakages at the 100pA level. FIGURE 10C. FUNCTION GENERATOR WITH FIXED FREQUENCIES FIGURE 10D. INTERCONNECTIONS FIGURE 10. FUNCTION GENERATOR 0.1 µF 1N914 6 7 4 2 3 0.1 µF 5.1k Ω 10k Ω 2.7k Ω 6 7 4 2 5 -15V 13k Ω +15V CENTERING 10k Ω -15V 910k Ω 62k Ω 11k Ω 10k Ω EXTERNAL OUTPUT 11k Ω HIGH FREQUENCY LEVEL 7-60pF EXTERNAL OUTPUT TO OUTPUT AMPLIFIER OUTPUT AMPLIFIER TO SINE WAVE SHAPER 2k Ω FREQUENCY ADJUSTMENT HIGH FREQ. SHAPE SYMMETRY THIS NETWORK IS USED WHEN THE OPTIONAL BUFFER CIRCUIT IS NOT USED -15V +15V 10k Ω 120 Ω 39k Ω 100k Ω 3 6 3 2 4 7 7.5k Ω +15V +15V 15k Ω 360 Ω 360 Ω 2M Ω 7-60 pF -15V -15V +15V 51 pF + CA3080A - CA3140 CA3080 + - + - 5 -15V FROM BUFFER METER DRIVER (OPTIONAL) FREQUENCY ADJUSTMENT METER DRIVER AND BUFFER AMPLIFIER FUNCTION GENERATOR SINE WAVE SHAPER M POWER SUPPLY ±15V -15V +15V DC LEVEL ADJUST 51 Ω WIDEBAND LINE DRIVER SWEEP GENERATOR GATE SWEEP V- SWEEP LENGTH EXTERNAL INPUT OFF V- COARSE RATE FINE RATE EXT. INT. CA3140, CA3140A |
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