Transistor power amplifier arrangement for matching circuit - has block of good thermally conducting material soldered onto ends of striplines connected to transistor connection pins

摘要

The amplifier arrangement includes a power transistor (2) whose output connection pins are soldered onto the ends of two parallel striplines (5, 6) formed on a circuit board (1). A block of material with good thermal conductivity, pref. copper, is soldered onto the ends of each of the striplines connected to the transistor connection pins. The side faces (12, 13) of the blocks which face each other form a capacitance and/or inductance between the strip lines. USE/ADVANTAGE - Push-pull circuit temp. gradient along soldering site between connection pins on strip kept extremely small.