Multistage amplifier with low power consumption and onboard signal receiver comprising such an amplifier
The amplifier includes two cascaded transistors (1,2) which provide two amplification stages. Static voltage inputs to the transistor bases are supplied by a resistive network (10-13) between the supply voltage (Vcc) and ground (Gnd). The dynamic drive points of the transistors are determined by two...
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| Format: | Patent |
| Sprache: | eng ; fre ; ger |
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| Zusammenfassung: | The amplifier includes two cascaded transistors (1,2) which provide two amplification stages. Static voltage inputs to the transistor bases are supplied by a resistive network (10-13) between the supply voltage (Vcc) and ground (Gnd). The dynamic drive points of the transistors are determined by two capacitors (9,6) which are connected to ground. A gain control device consists of a transistor which is connected between the amplifier output current and the current limit of the first stage transistor emitter. The base is connected to the output of the control circuit. The gain of each amplifier is proportional to the current flow and the overall gain is proportional to the square of the current value. |
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