Self-calibration symmetrical type constant current capacitor charging and discharging circuit
A capacitor charging and discharging, symmetrical technology, applied in the direction of battery circuit devices, circuit devices, collectors, etc., can solve the problem of difficult adjustment of charging and discharging current, and achieve the effect of improving accuracy
Active Publication Date: 2015-02-25
STATE GRID CORP OF CHINA +1
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The invention solves the problem that the charging and discharging currents in the existing symmetrical voltage-current changing circuit are difficult to be adjusted to be equal, and provides a self-calibrating symmetrical constant current capacitor charging and discharging circuit
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0011] Self-calibration symmetrical constant current capacitor charging and discharging circuit, including symmetrical voltage-current changing circuit, symmetrical voltage-current changing circuit including first, second, third, fourth operational amplifiers A1, A2, A3, A4, the first One, second, third, and fourth transistors Q1, Q2, Q3, and Q4, first, second, third, and fourth resistors R1, R2, R3, and R4, and resistors Re; the fourth transistor The emitter of Q4 is connected to the second power supply V2 through the fourth resistor R4, and the collectors of the third and fourth triodes Q3 and Q4 are respectively used as the charging terminal and the discharging terminal; the charging terminal is connected in series with the first sampling resistor Rc1, and the discharging terminal The second sampling resistor and Rc2 are connected in series; the discharge circuit of the symmetrical voltage-current change circuit is connected in series with a voltage-controlled resistor R VC...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a capacitor charging and discharging circuit, in particular to a self-calibration symmetrical type constant current capacitor charging and discharging circuit solving the problem that in the prior art, charging and discharging currents of a symmetrical voltage-current changing circuit are very difficultly adjusted to be equal. The self-calibration symmetrical type constant current capacitor charging and discharging circuit comprises the existing symmetrical voltage-current changing circuit, and sampling resistors are additionally arranged in a charging loop and a discharging loop respectively based on the existing symmetrical voltage-current changing circuit. The terminal voltages of the two sampling resistors are connected to the input end of a subtracter, the input end of a summator is connected to the output end of the subtracter, the other input end of the summator is connected with a reference voltage, and the output end of the summator is connected with a voltage controlled resistor which is connected to the discharging loop. When the output frequency of signals is changed, the current of the charging loop can be automatically adjusted to be equal to the current of the charging loop, and accurate signals with the high level equal to the low level are obtained. The problem that adjustment is not convenient in actual operation is solved, and the signal generating accuracy is improved.
Description
technical field [0001] The invention relates to a capacitor charging and discharging circuit, in particular to a self-calibrating symmetrical constant current capacitor charging and discharging circuit. Background technique [0002] In the signal generator, a current source is used to charge and discharge the capacitor, and the voltage at both ends of the capacitor is connected to the voltage comparator to form a basic circuit for generating signal changes. To obtain a signal whose width is exactly equal to the high level and the low level, the current value of the charging circuit and the discharging circuit directly affects the accuracy of the signal. Therefore, when designing a circuit, a symmetrical voltage-current changing circuit is often used to realize a symmetrical constant current charging and discharging circuit. Existing symmetrical voltage-current changing circuits such as figure 1 As shown, it includes the first, second, third, and fourth operational amplifie...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H02J7/00
CPCH02J15/00
Inventor 黄耀雄韩煜韩鹏煜
Owner STATE GRID CORP OF CHINA