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Table 1.

Components list and specifications for the miniature transmitter

ComponentValue/TypeSizeManufacturer
R1 1.8-2.7 MΩ 0402 (1.0 mm×0.5 mm×0.2 mm)  
R2 15-18 kΩ 0402  
R3 0-100 Ω 0402  
C1 0.47-1.0 μF 2×0402 SRT Technologies, Cadolzburg, Germany 
C2 220 nF 0402  
C3 15 pF 0402  
C4 3.3 pF 0402  
C5 2.2 pF 0402  
L1 100 nH 0402 Stelco, Newmarkt, Germany 
L2 1.0 μH 0603 (1.5 mm×1.0 mm×1.0 mm) Stelco 
L3 100 nH 0402 Stelco 
T1 BFR92 SOT323 (2.0 mm× 1.25 mm×0.9 mm) Philips, Zurich, Switzerland 
 S852TF SOT490 (1.7 mm×0.9 mm×0.8 mm) Vishay, Selb, Germany 
Large (5.0 mm×3.2 mm×1.1 mm) Micro-crystal, Grenchen, Switzerland 
 Small (3.5 mm×2.2 mm×0.7 mm) Tele Tec, Saitama, Japan 
PDTA114 PNP, 10 K bias resistor SOT490 (1.7 mm×0.9 mm×0.8 mm) Philips 
ComponentValue/TypeSizeManufacturer
R1 1.8-2.7 MΩ 0402 (1.0 mm×0.5 mm×0.2 mm)  
R2 15-18 kΩ 0402  
R3 0-100 Ω 0402  
C1 0.47-1.0 μF 2×0402 SRT Technologies, Cadolzburg, Germany 
C2 220 nF 0402  
C3 15 pF 0402  
C4 3.3 pF 0402  
C5 2.2 pF 0402  
L1 100 nH 0402 Stelco, Newmarkt, Germany 
L2 1.0 μH 0603 (1.5 mm×1.0 mm×1.0 mm) Stelco 
L3 100 nH 0402 Stelco 
T1 BFR92 SOT323 (2.0 mm× 1.25 mm×0.9 mm) Philips, Zurich, Switzerland 
 S852TF SOT490 (1.7 mm×0.9 mm×0.8 mm) Vishay, Selb, Germany 
Large (5.0 mm×3.2 mm×1.1 mm) Micro-crystal, Grenchen, Switzerland 
 Small (3.5 mm×2.2 mm×0.7 mm) Tele Tec, Saitama, Japan 
PDTA114 PNP, 10 K bias resistor SOT490 (1.7 mm×0.9 mm×0.8 mm) Philips 

For widely available components, no particular manufacturer is indicated.

Components are identified in Fig. 1.

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