| 摘要 |
The circuit transmitting intermediate amplifying signal of AM and FM with one common output stage (OUT) includes an electronic switch (1) generating a first and a second output signals (K1,K2) for selective driving of the current sources providing bias voltage to the AM and FM intermediate amplifying stage, a light emission diode driver (2) driving the light emission diodes (D1, D2) by checking the first output signals (K1,K2) of the electronic switch (1) and an analog switch (3) selecting and transmitting the output signal of the FM or AM intermediate amplifying stages (5,6) through a common output stage (OUT).
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