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NE5209 Datasheet(PDF) 6 Page - NXP Semiconductors |
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NE5209 Datasheet(HTML) 6 Page - NXP Semiconductors |
6 / 15 page Philips Semiconductors Product specification NE/SA5209 Wideband variable gain amplifier 1990 Aug 20 6 RF/IF INPUT AGC OUTPUT BAT 17 BAT 17 5209 5209 5209 R4 C4 D1 D2 D3 R6 R1 R2 L1 L2 R3 C3 R5 5230 + – VCC VCC R1 =R2 = 3.9k R3 = 360Ω R4 = 62k R5 = 100Ω R6 = 1k pot 2 πfL1 = 10k L1 =L2 SR00239 Figure 3. AGC Configuration Using Cascaded NE5209s 1 2 3 4 5 6 7 8 9 10 11 12 13 14 16 15 OUTA VCC1 INA GND2 VCC2 GND1 GND1 GND2 INB GND1 VBG VAGC GND2 OUTB GND2 GND2 V OUTA OUTB VCC 5VDC + VIN 10 µF 0.1 µF 0.1 µF 0.1 µF 0.1 µF 0.1 µF 0.1 µF 50 Ω (16-Pin SO, 150-mil wide) SR00240 Figure 4. VGA AC Evaluation Board This circuit will exhibit about a 7dB noise figure with approximately 22dB gain. 50 Ω 50 Ω 50 Ω +5V +1V MINI CIRCUITS 2:1 BALUN OR SIMILAR SOURCE OUTPUT 5209 1 : 2 VAGC SR00241 Figure 5. Broadband Noise Optimization |
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