Test control circuit

Abstract

The utility model discloses a test control circuit, which comprises an amplifier U1, a first pin output end of the amplifier U1 is respectively connected with a resistor R1A, a resistor R4, a negative electrode of a diode D1, a positive electrode of a diode D3 and one end of a second pin of a connector P2, and the second pin of the connector P2 and a third pin of the connector P2 are signal output ends; the fourth pin input end of the amplifier U1 is connected with the other end of the resistor R1A and the other end of the resistor R4 and connected with one end of the resistor R3. The third pin input end of the amplifier U1 is respectively connected with one end of the resistor R1, one end of the resistor R2, one end of the capacitor C1, one end of the third pin of the connector P2 and one end of the second pin of the connector P1 and is connected with the negative electrode of the diode D3, and the fifth pin of the amplifier U1 is connected with the other end of the resistor R1 and one end of the positive electrode of the diode D2. And the test performance is more stable.

Description

Technical Field:

[0001] The utility model relates to the field of measurement and testing, and specifically to a test control circuit. Background Art:

[0002] On an ICT test fixture, a test amplifier circuit is applied.

[0003] The existing authorized patent (publication number: CN218567441U) discloses a test amplifier circuit that combines an oscillation signal and power drive. Although it solves the technical problem that the voltage input to the positive phase of amplifier U2 from the positive-phase input sub-circuit cannot be adjusted, resulting in a narrow test bandwidth and unstable performance, its circuit design is complex. Therefore, a test control circuit is proposed. Summary of the Utility Model:

[0004] The purpose of the utility model is to provide a test control circuit to solve the problems raised in the above background art.

[0005] The utility model is implemented by the following technical solutions: A test control circuit includes:

[0006] Amplifier U1, the output terminal of the 1st pin of the amplifier U1 is respectively connected to the resistor R1A, resistor R4, the negative electrode of diode D1, the positive electrode of diode D3, and one end of the 2nd pin of connector P2. The 2nd pin of the connector P2 is the signal output terminal;

[0007] The input terminal of the 4th pin of the amplifier U1 is respectively connected to the other ends of the resistor R1A and resistor R4, and is connected to one end of the resistor R3;

[0008] The input terminal of the 3rd pin of the amplifier U1 is respectively connected to the resistor R1, resistor R2, capacitor C1, the 3rd pin of connector P2, and one end of the 2nd pin of connector P1, and is connected to the negative electrode of diode D3. The 2nd pin of the connector P1 and the 3rd pin of the connector P2 are signal input terminals;

[0009] The 5th pin of the amplifier U1 is connected to the other end of the resistor R1 and the positive electrode of diode D2.

[0010] Preferably: The 1st pin and the 4th pin of the connector P2 are short-circuited and connected to one end of the 1st pin of the connector P1, and are grounded.

[0011] Preferably: The resistor R2, resistor R3, capacitor C1, the 2nd pin of the amplifier U1, the positive electrode of diode D1, and the negative electrode of diode D2 are all grounded.

[0012] Preferably, the resistance value of the resistor R1 is 10 KΩ, the resistance value of the resistor R2 is 2 KΩ, the resistance value of the resistor R3 is 536 Ω, the resistance value of the resistor R4 is 33 MΩ, and the capacitor C1 is 300 nF.

[0013] Preferably, the model of the amplifier U1 is AD8605.

[0014] Advantages of the present utility model: The output terminal of the 1st pin of the amplifier U1 is respectively connected to one end of the resistor R1A, the resistor R4, the negative electrode of the diode D1, the positive electrode of the diode D3, and the 2nd pin of the connector P1. The second pin of the P1 connector and the 3rd pin of the connector P2 are signal output terminals; the input terminal of the 4th pin of the amplifier U1 is respectively connected to the other ends of the resistor R1A and the resistor R4, and is connected to one end of the resistor R3; the input terminal of the 3rd pin of the amplifier U1 is respectively connected to the resistor R1, the resistor R2, the capacitor C1, the 3rd pin of the connector P2, and one end of the 2nd pin of the connector P1, and is connected to the negative electrode of the diode D3. The 5th pin of the amplifier U1 is connected to the other end of the resistor R1 and one end of the positive electrode of the diode D2. The present utility model can effectively improve the test efficiency, reduce the production cost, and make the test performance more stable. Description of the drawings:

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art.

[0016] Figure 1 It is a circuit schematic diagram of the present utility model. Specific implementation manners:

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Embodiment

[0019] Please refer to Figure 1 , the present utility model provides a technical solution: A test control circuit, including:

[0020] An amplifier U1, the output terminal of the 1st pin of the amplifier U1 is respectively connected to one end of the resistor R1A, the resistor R4, the negative electrode of the diode D1, the positive electrode of the diode D3, and the 2nd pin of the connector P2. The 2nd pin of the connector P2 is a signal output terminal;

[0021] The 4-foot input terminal of the amplifier U1 is respectively connected to the other ends of the resistor R1A and the resistor R4, and is also connected to one end of the resistor R3;

[0022] The 3-foot input terminal of the amplifier U1 is respectively connected to the resistor R1, the resistor R2, the capacitor C1, the 3-foot of the connector P2 and one end of the 2-foot of the connector P1, and is also connected to the negative pole of the diode D3. The 2-foot of the connector P1 and the 3-foot of the connector P2 are signal input terminals;

[0023] The 5-foot of the amplifier U1 is connected to the other end of the resistor R1 and the positive pole of the diode D2.

[0024] In this embodiment, specifically: The 1-foot and 4-foot of the connector P2 are short-circuited and connected to one end of the 1-foot of the connector P1, and are grounded.

[0025] In this embodiment, specifically: The resistor R2, the resistor R3, the capacitor C1, the 2-foot of the amplifier U1, the positive pole of the diode D1, and the negative pole of the diode D2 are all grounded.

[0026] In this embodiment, specifically: The resistance value of the resistor R1 is 10KΩ, the resistance value of the resistor R2 is 2KΩ, the resistance value of the resistor R3 is 536Ω, the resistance value of the resistor R4 is 33MΩ, and the capacitor C1 is 300nF.

[0027] In this embodiment, specifically: The model of the amplifier U1 is AD8605.

[0028] Connect the 1-foot output terminal of the amplifier U1 to the resistor R1A, the resistor R4, the diode D1, the diode D3 and one end of the 2-foot of the connector P2 respectively, and a signal output terminal is connected; The 4-foot input terminal of the amplifier U1 is respectively connected to the other ends of the resistor R1A and the resistor R4, and is also connected to one end of the resistor R3; The 3-foot input terminal of the amplifier U1 is respectively connected to the resistor R1, the resistor R2, the capacitor C1, the 3-foot of the connector P2 and one end of the 2-foot of the connector P1, and is also connected to the other end of the diode D3 and the signal input terminal. The utility model can effectively improve the test efficiency, reduce the production cost, and make the test performance more stable.

[0029] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A test control circuit, characterized in that, Comprising: An amplifier U1, the output terminal of pin 1 of the amplifier U1 is respectively connected to one end of a resistor R1A, a resistor R4, the negative electrode of a diode D1, the positive electrode of a diode D3, and pin 2 of a connector P2, and pin 2 of the connector P2 is a signal output terminal; The input terminal of pin 4 of the amplifier U1 is respectively connected to the other ends of the resistor R1A and the resistor R4, and is connected to one end of a resistor R3; The input terminal of pin 3 of the amplifier U1 is respectively connected to a resistor R1, a resistor R2, a capacitor C1, pin 3 of the connector P2, and one end of pin 2 of the connector P1, and is connected to the negative electrode of the diode D3. Pin 2 of the connector P1 and pin 3 of the connector P2 are signal input terminals; Pin 5 of the amplifier U1 is connected to the other end of the resistor R1 and the positive electrode of a diode D2.

2. The test control circuit according to claim 1, wherein: Pin 1 and pin 4 of the connector P2 are short-circuited and connected to one end of pin 1 of the connector P1, and are grounded.

3. The test control circuit according to claim 1, wherein: The resistor R2, the resistor R3, the capacitor C1, pin 2 of the amplifier U1, the positive electrode of the diode D1, and the negative electrode of the diode D2 are all grounded.

4. The test control circuit according to claim 1, characterized in that: The; the resistance value of the resistor R1 is 10 KΩ, the resistance value of the resistor R2 is 2 KΩ, the resistance value of the resistor R3 is 536 Ω, the resistance value of the resistor R4 is 33 MΩ, and the capacitor C1 is 300 nF.

5. The test control circuit according to claim 1, wherein: The model of the amplifier U1 is AD8605.

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