Cpt atomic clock servo control soc

A CPT atomic clock servo control SoC, comprising a microprocessor (1), a photoelectric signal demodulation functional module (5), a temperature control loop functional module (6), a laser and microwave loop control functional module (7), a C field control functional module (8), and a bus bridge (12), wherein

• the bus bridge is connected to a system bus and a peripheral bus, used for connecting to buses with different speeds;
• the photoelectric signal demodulation functional module is connected to the peripheral bus, used for demodulating a photoelectric signal of a physical system of the atomic clock, and extracting power change information of a microwave and a laser therefrom;
• the temperature control loop functional module is connected to the peripheral bus, used for separately controlling temperatures of an absorption cell and a laser tube in the physical system of the atomic clock;
• the laser and microwave loop control functional module is connected to the peripheral bus, and used for performing low frequency modulation on the microwave and a drive DC current of a VCSEL, and then synthesizing, by using Bias-T, a modulated microwave signal with certain power and a certain frequency and the modulated DC current , and then inputting the synthesized signal into the VCSEL of the physical system of the atomic clock, to implement laser frequency locking;
• after the laser frequency locking, modulation and phase sensitive demodulation are performed on the microwave to obtain a negative voltage feedback signal which is applied to a voltage controlled electrode of a voltage controlled crystal oscillator, to implement locking of a microwave loop;
• the C field control functional module is connected to the peripheral bus, configures a DAC by using a CPU, outputs a stable adjustable voltage, and then converts the voltage into a current signal by using a V-I conversion circuit to drive a solenoid, and provides a stable C field for the absorption cell;
• and
• the microprocessor is connected to the system bus, used for controlling the photoelectric signal demodulation functional module (5), the temperature control loop functional module (6), the laser and microwave loop control functional module (7), and the C field control functional module (8).