CN210015387U - Adjustable voltage stabilizing circuit for operational amplifier - Google Patents
Adjustable voltage stabilizing circuit for operational amplifier Download PDFInfo
- Publication number
- CN210015387U CN210015387U CN201921399983.5U CN201921399983U CN210015387U CN 210015387 U CN210015387 U CN 210015387U CN 201921399983 U CN201921399983 U CN 201921399983U CN 210015387 U CN210015387 U CN 210015387U
- Authority
- CN
- China
- Prior art keywords
- resistor
- chip
- resistance
- operational amplifier
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Amplifiers (AREA)
Abstract
The utility model belongs to the technical field of operational amplifier, especially, be a voltage stabilizing circuit with adjustable operational amplifier is used, including input U0 and output U1, input U0 is connected with resistance R1's one end, resistance R2's one end, electric capacity C1's one end, resistance R1's the other end is connected with resistance R3's one end and chip I1's positive input end, resistance R3's the other end is connected with chip I2's pin 3, chip I2's pin 1 is connected with resistance R5's one end, resistance R5's the other end with chip I1's output is connected, resistance R2's the other end with chip I1's negative pole input is connected with and is connected with resistance R4's one end, resistance R4's the other end is connected with chip I3's pin 3. The utility model relates to a rationally, it is suitable for the convenience, applicable operational amplifier in the difference.
Description
Technical Field
The utility model relates to an operational amplifier technical field especially relates to a voltage stabilizing circuit with adjustable operational amplifier is used.
Background
The operational amplifier is a circuit unit with very high amplification factor, in an actual circuit, a feedback network is usually combined to form a certain functional module, the operational amplifier is an amplifier with a special coupling circuit and feedback, and an output signal of the operational amplifier can be a result of mathematical operations such as addition, subtraction, differentiation, integration and the like of an input signal.
The voltage stabilizing value of the voltage stabilizing circuit at the input end of the existing operational amplifier is a fixed value, and the voltage stabilizing value cannot be adjusted according to the requirements of different operational amplifiers, so that a voltage stabilizing circuit matched with the operational amplifier is required to be prepared when the operational amplifier is used, and the operation is complicated.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing an adjustable voltage stabilizing circuit for an operational amplifier.
In order to achieve the above purpose, the utility model adopts the following technical scheme: an adjustable voltage stabilizing circuit for an operational amplifier comprises an input end U0 and an output end U1, wherein the input end U0 is connected with one end of a resistor R1, one end of a resistor R2 and one end of a capacitor C1, the other end of the resistor R1 is connected with one end of a resistor R3 and an anode input end of a chip I1, the other end of the resistor R3 is connected with a pin 3 of a chip I2, a pin 1 of a chip I2 is connected with one end of a resistor R5, the other end of the resistor R5 is connected with an output end of the chip I1, the other end of the resistor R2 is connected with a cathode input end of a chip I1 and is connected with one end of a resistor R4, the other end of the resistor R4 is connected with a pin 3 of a chip I4, a pin 2 of the chip I4 is connected with one end of a resistor R4, one end of a resistor R4 and one end of a capacitor C4 and is connected with a pin 2 of the chip I4, the other end of the resistor R7 is connected with one end of a slide rheostat R8, the sliding end of the slide rheostat R8, one end of the slide rheostat R8, the other end of the resistor R7 are connected with a pin 1 of the chip I3, and the other end of the slide rheostat R8 is connected with the other end of the capacitor C1 and the other end of the capacitor C2.
Preferably, the resistances of the resistor R1, the resistor R2, the resistor R3 and the resistor R4 are all 0.1 Ω, the resistance of the resistor R5 is 2K Ω, the resistance of the resistor R6 is 1O Ω, and the resistance of the resistor R7 is 120 Ω. The maximum resistance value of the slide rheostat 8 is 10K omega.
Preferably, the capacitance value of the capacitor C1 is 0.1uH, and the capacitance value of the capacitor C2 is 1 uH.
Preferably, the model of the chip I1 is UA 741.
Preferably, the model numbers of the chip I2 and the chip I3 are both LM 317.
Preferably, the other end of the sliding rheostat R8, the other end of the capacitor C1 and the other end of the capacitor C2 are all grounded.
Compared with the prior art, the beneficial effects of the utility model are that: at first, the device comprises stabiliser LM317 with two adjustable, and output current is the total of the electric current that pin 2 of stabiliser LM317 with two adjustable flows, and chip I1 is the output current who is used for balancing two stabiliser, can adjust output U1's voltage through adjusting the resistance of slide rheostat R8 to applicable operational amplifier in the difference, the utility model relates to a rationally, be suitable for convenient, applicable in different operational amplifier.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: an adjustable voltage stabilizing circuit for an operational amplifier comprises an input end U0 and an output end U1, wherein the input end U0 is connected with one end of a resistor R1, one end of a resistor R2 and one end of a capacitor C1, the other end of a resistor R1 is connected with one end of a resistor R3 and the positive input end of a chip I1, the other end of the resistor R3 is connected with a pin 3 of a chip I2, a pin 1 of a chip I2 is connected with one end of a resistor R5, the other end of the resistor R5 is connected with the output end of the chip I5, the other end of the resistor R5 is connected with the negative input end of the chip I5 and is connected with one end of the resistor R5, the other end of the resistor R5 is connected with a pin 3 of the chip I5, a pin 2 of the chip I5 is connected with one end of the resistor R5, one end of the resistor R5 and one end of the capacitor C5 are connected with a rheostat, the sliding end of the slide rheostat R8, one end of the slide rheostat R8 and the other end of the resistor R7 are connected with the pin 1 of the chip I3, and the other end of the slide rheostat R8 is connected with the other end of the capacitor C1 and the other end of the capacitor C2.
The resistances of the resistor R1, the resistor R2, the resistor R3 and the resistor R4 are all 0.1 omega, the resistance of the resistor R5 is 2K omega, the resistance of the resistor R6 is 1O omega, and the resistance of the resistor R7 is 120 omega. The maximum resistance of the slide rheostat 8 is 10K omega, the capacitance of the capacitor C1 is 0.1uH, the capacitance of the capacitor C2 is 1uH, the model of the chip I1 is UA741, the models of the chip I2 and the chip I3 are LM317, the other end of the slide rheostat R8, the other end of the capacitor C1 and the other end of the capacitor C2 are all grounded, the device comprises two adjustable voltage regulators LM317, the output current is the sum of currents flowing out of pins 2 of the two adjustable voltage regulators LM317, the chip I1 is used for balancing the output currents of the two voltage regulators, the voltage of the output end U1 can be adjusted by adjusting the resistance of the slide rheostat R8, and therefore the slide rheostat can be applied to different operational amplifiers.
The working principle is as follows: the utility model discloses a stabiliser LM317 with adjustable by two is constituteed, output current is the total of the electric current that pin 2 of two stabiliser LM317 with adjustable flows, chip I1 is the output current who is used for balancing two stabiliser, when chip I2's output current is greater than chip I2's output current, the voltage drop on the resistance R1 increases, chip I1's homophase end electric potential V reduces, chip I1's output terminal voltage reduces, through adjusting the resistance of slide rheostat R8, the messenger can make output U1's voltage decline, output current reduces, and restore balance after adjusting, when heightening output voltage U1 voltage, only need to adjust slide rheostat R8's resistance just can heighten output voltage U1 voltage.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. The utility model provides an adjustable voltage stabilizing circuit for operational amplifier, includes input U0 and output U1, its characterized in that: the input end U0 is connected with one end of a resistor R1, one end of a resistor R2 and one end of a capacitor C1, the other end of the resistor R1 is connected with one end of a resistor R3 and the positive input end of a chip I1, the other end of the resistor R3 is connected with a pin 3 of the chip I2, a pin 1 of the chip I2 is connected with one end of a resistor R5, the other end of the resistor R5 is connected with the output end of the chip I1, the other end of the resistor R2 is connected with the negative input end of the chip I1 and connected with one end of a resistor R4, the other end of the resistor R4 is connected with a pin 3 of a chip I3, a pin 2 of the chip I3 is connected with one end of a resistor R3, one end of a resistor R3 and one end of a capacitor C3 and connected with a U3, the other end of the resistor R3 is connected with one end of a slide rheostat 3, the sliding end of the slide rheostat R8, one end of the slide rheostat R8, the other end of the resistor R7 and the pin 1 of the chip I3 are connected, and the other end of the slide rheostat R8 is connected with the other end of the capacitor C1 and the other end of the capacitor C2.
2. The adjustable voltage stabilizing circuit for an operational amplifier of claim 1, wherein: the resistances of the resistor R1, the resistor R2, the resistor R3 and the resistor R4 are all 0.1 omega, the resistance of the resistor R5 is 2K omega, the resistance of the resistor R6 is 1O omega, the resistance of the resistor R7 is 120 omega, and the maximum resistance of the slide rheostat 8 is 10K omega.
3. The adjustable voltage stabilizing circuit for an operational amplifier of claim 1, wherein: the capacitance value of the capacitor C1 is 0.1uH, and the capacitance value of the capacitor C2 is 1 uH.
4. The adjustable voltage stabilizing circuit for an operational amplifier of claim 1, wherein: the model of the chip I1 is UA 741.
5. The adjustable voltage stabilizing circuit for an operational amplifier of claim 1, wherein: the model numbers of the chip I2 and the chip I3 are both LM 317.
6. The adjustable voltage stabilizing circuit for an operational amplifier of claim 1, wherein: the other end of the sliding rheostat R8, the other end of the capacitor C1 and the other end of the capacitor C2 are all grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921399983.5U CN210015387U (en) | 2019-08-27 | 2019-08-27 | Adjustable voltage stabilizing circuit for operational amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921399983.5U CN210015387U (en) | 2019-08-27 | 2019-08-27 | Adjustable voltage stabilizing circuit for operational amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210015387U true CN210015387U (en) | 2020-02-04 |
Family
ID=69320063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921399983.5U Active CN210015387U (en) | 2019-08-27 | 2019-08-27 | Adjustable voltage stabilizing circuit for operational amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210015387U (en) |
-
2019
- 2019-08-27 CN CN201921399983.5U patent/CN210015387U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203445784U (en) | Power supply circuit having line loss compensation function | |
| CN201110982Y (en) | Battery analogue circuit | |
| CN103760943B (en) | A kind of slew rate enhancing circuit being applied to LDO | |
| CN105183061B (en) | A kind of voltage buffer circuit | |
| CN205080182U (en) | Peak peak detection circuit | |
| CN206524614U (en) | A kind of current-limiting protection controls circuit | |
| CN206236080U (en) | Face-to-face translator | |
| CN101951003B (en) | Charging management device | |
| CN210015387U (en) | Adjustable voltage stabilizing circuit for operational amplifier | |
| CN209979728U (en) | Bidirectional current detection circuit | |
| CN101949966A (en) | Mobile terminal capable of accurately detecting charging current | |
| CN207354224U (en) | Power amplification circuit for speaker of voice box | |
| CN205725459U (en) | A kind of self-adaption switch electric power source flow equalizing circuit | |
| CN207440254U (en) | Battery electric quantity checking device and lamps and lanterns | |
| CN203025328U (en) | Adjustable active load circuit | |
| CN206850666U (en) | A kind of doubleway output current foldback circuit | |
| CN205160149U (en) | Linear line loss compensating circuit of charger | |
| CN203595958U (en) | N+1 redundant power source load balancing circuit based on CPCI interface | |
| CN201440168U (en) | E-load machine | |
| CN105915029A (en) | Power supply conversion efficiency selection circuit, method and mobile power supply thereof | |
| CN206556669U (en) | The digital integrator of data collection station | |
| CN206573967U (en) | A kind of positive and negative adjustable D.C. regulated power supply | |
| CN205666752U (en) | Power conversion efficiency selection circuit and portable power source | |
| CN204856270U (en) | Positive voltage stabilizing circuit of step -down molded lines nature with adjustable exportable zero | |
| CN110045173B (en) | Bidirectional current detection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |