FM Transmitter
Sistemas Electrónicos S.A EM 250 COMPACT DIG
Technical Manual - v1.1 - February 2006
32
Fig. 2-5: DETAIL OF OUTPUT AMPLIFIER SECTION.
Elements numbered in Figure 2-5 can be described as follows:
1
- Input splitter transformer and coupling circuit.
2
- Bias adjustment potentiometer.
3
- Bias regulator circuit.
4
- MOSFET push-pull arranged, twin-transistor capsule.
5
- Output combiner transformer and matching circuit.
Following this amplifier stage, module includes a low-pass filter in order to attenuate or suppress all
harmonics and IM products beyond Band II limits, as shown in Figure 2-6.
