Embedded Engineer Interview Question 3 Hardware

Digital analog electricity

One 、 Translation of professional terms

MCU____________
DSP____________
EPROM__________
PWM____________

Two 、 Fill in the blanks

1、 NAND gate expression _______
2、 Triode working state _______、、.
3、 The regulator uses a diode ______ characteristic .

3、 ... and 、 Draw a circuit diagram

1、 Oscillating circuit .

2、 Capacitance three-point oscillation circuit .

3、 Rectifier circuit , Principle of analysis .

4、 Battery low voltage protection circuit . The battery 3V When it is lower than 2V Time protection ,LED Call the police .

5、 Operational amplifier circuit

6、 And 、 or 、 Non gate digital logic diagram and discrete device diagram

7、138 Logic diagram of decoder digitator

Four 、 Analysis or calculation circuit

1、 The figure below CE What's the voltage ？ What state does the triode work in .

2、 The figure below A Voltage voltage ？

 

PCB

1、 draw PCB What should I pay attention to ？

2、 draw PCB What tools are used for the board ？

3、 What is encapsulation ？