Signal processing circuit board for teaching

A signal processing circuit board for teaching comprises training modules of seven signal processing circuits, namely a single-end input amplification circuit module A1, an LM324 operational amplifier module A2, a differential input amplification circuit module A3, an optional common electronic element module A4, a shaping circuit module A5, a frequency/voltage conversion circuit module A6 and an alarm circuit module A7. According to the utility model, each circuit module is independently arranged, electronic components of the circuit modules A1-A5 are discrete components, and pins of the electronic components are provided with wiring terminals; the circuit module A6 is provided with nine terminals, and the circuit module A7 is provided with five terminals. Parameter testing or circuit connection can be carried out through a lead with a plug. According to the utility model, students can conveniently test element characteristics, freely select elements and build a signal processing circuit according to require