Analog output circuit

• Main Author: DING WEISEN
• Format: Patent
• Language: English
• Published: 11.03.2015
• Subjects: BASIC ELECTRONIC CIRCUITRY; CODE CONVERSION IN GENERAL; CODING; CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; DECODING; ELECTRICITY; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING

The utility model discloses an analog output circuit; a PWM signal generation module is connected in sequence with a level isolation and transition module, a secondary level RC filter module, a voltage following circuit module, and an output protection circuit module; the PWM signal generation module is used for generating a PWM signal; the level isolation and transition module realize level and electrical characteristic in-out isolation for the PWM signal; the secondary level RC filter module filters the isolated PWM signal; the voltage following circuit module reduces output impedance of the filtered PWM signal; the output protection circuit module prevents the output PWM signal from being affected by an external EMC. The analog output circuit uses optical coupler isolation to isolate an interface from an inner circuit; the interface is added with an EMC lightning protection anti-surge design; the secondary level RC filter circuit can filter; the analog output circuit is simple in control mode, low in cost, good in load linear stability and temperature stability, good in circuit anti-interference property, and an output precision can satisfy needs of most places.