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STD AF7KR_HF_preamp

License: CC-BY-SA 3.0

Mode: Editors' pick

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Update time: 2020-08-19 23:33:31
Creation time: 2020-08-11 23:11:19
Description
50 Ohm input, 22 Ohm output, 22dB gain. Input impedance is flat and independent of the output load. Other input impedance values (10 to 1000 Ohm) are easily achievable by changing resistors. No inductors. Bandwidth -3dB at 35MHz. Expected good IP2 and decent IP3 using cheap available parts.
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ID Name Designator Footprint Quantity
1 IN P1 HDR-1X2/2.54 1
2 12V P2 HDR-1X2/2.54 1
3 OUT P3 HDR-1X2/2.54 1
4 100n C1,C3,C4 1206 3
5 1u C2 1206 1
6 470 R1,R3 1206 2
7 10 R5 1206 1
8 1k5 R2 1206 1
9 220 R4 1206 1
10 22 R6,R7 1206 2
11 150 R8 1206 1
12 39 R9 1206 1
13 MMBT2222A Q1,Q2 SOT-23(SOT-23-3) 2
14 MMBT2907A Q3 PG-SOT23-3_L2.9-W1.3-P1.90-LS2.4-BR 1
15 1N4148 D1 SOD-80_L3.5-W1.5-FD 1

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