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Fig. 3.107: Circuit 107 – Constant current source 1.2 mA
Circuit 107 to 109 The flat output characteristics of the emitter-to-ground circuit ensure that the current flow-
ing through R3 (or R4 or R5) is independent of this resistor value (within certain limits).
Fig. 3.108: Circuit 108 – Constant current source 2 mA
Fig. 3.106: Circuit
106 – Whistle buoy
287
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