PCB Technical - Audio signal generator PCB copy board clone imitation

1. The principle of audio signal generator:

The audio signal generator is actually a triode oscillator circuit, with two principles, one is an LC oscillator and the other is an RC oscillator. Let's take the RC oscillator as an example to introduce it. The figure below is a multivibrator with two complementary circuits. The circuit is simple, easy to oscillate, and has high efficiency. Circuit principle: BG1 is an NPN low-power high-frequency tube, and BG2 is a PNP low-power low-frequency tube. When the power switch K is just turned on, the two transistors have not turned on. The power supply charges the capacitor C through R1, R2, and RL. The voltage at both ends of C rises exponentially. When this voltage rises to the threshold voltage at which the tube is turned on, BG1BG2 starts to conduct. Then there is a positive feedback process: UC rises to cause IB1, IC1 to rise, UC1 to fall, UB2 to fall, UC2 to rise, UB1 to rise, and UC1 to fall.

The PCB factory immediately saturates BG1BG2 during the production process. The capacitor C then discharges through the BG1 emitter junction and the BG2 collector emitter via R2. As the discharge progresses, the following positive feedback process occurs again: UC drops make IB1 drop, UC1 rises, UB2 rises, UC2 falls, UC1 rises, and UB1 falls. So that BG1BG2 quickly restored to the original cut-off state.

Repeatedly like this, a rectangular pulse signal is obtained on the load resistance, which can drive a speaker to sound. Adjusting the resistance value of R1 can change the frequency of the oscillator.

2. Audio signal generator PCB copy board:

Audio signal generator duplication can also be said to be audio signal generator clone, audio signal generator imitation, audio signal generator circuit board copy board. The general method is to first disassemble the audio signal generator, drive out its internal control board and all circuit boards, and then rely on professional copy board technology to copy out these circuit boards and PCBs one by one, and send the resulting file diagrams to the PCB. After the board is manufactured by the board factory, all circuit boards are cloned completely according to the list of purchased components. After that, rely on professional software designers to carry out software programming of the working principle of the audio signal generator, and then assemble and weld the fax machine in the production and processing plant, and then the debugging and testing can be qualified. This process can clone the most advanced fax machine in a short period of time, greatly reducing its price.

For audio signal generator copy board, audio signal generator copy, audio signal generator cloning, audio signal generator imitation, etc., the PCB factory must master the copy from the PCB circuit board (PCB file), the decryption of the chip on the board, and the schematic diagram. Production (SCH file), BOM list production, PCB processing, prototype production to prototype debugging one-stop service. If the customer has the need to copy and clone the circuit board of the audio signal generator, they can only provide one or two complete prototypes to the PCB factory, and the PCB factory can complete the whole project development for you, and deliver you multiple prototypes and complete sets Technical documents and production documents