Analog quantity controllable output circuit

Abstract

The utility model provides an analog quantity controllable output circuit, comprising an isolator, the isolator is respectively connected with an analog switch and a power supply module, the analog switch is also connected with a divider resistor, and the isolator, the power supply module, the analog switch and the divider resistor are all connected with a CPCI connector; 128 paths of voltage division analog quantity input interfaces and 8 paths of simultaneously controllable analog quantity output interfaces are provided, so that controllable output of analog quantity is realized.

Description

Technical Field

[0001] The utility model relates to an analog controllable output circuit. Background Art

[0002] Existing feedback systems, data acquisition systems, etc. all require analog controllable output, which transmits data information with the CPU board through the data bus, address bus and control bus, and controls the system by sending control signals through the CPU board; the main framework of the existing analog controllable output circuit usually uses imported analog switches, optocouplers, transceivers and power modules to realize the board functions, and the main components are not domestically produced and are easily restricted. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides an analog controllable output circuit.

[0004] The utility model is realized through the following technical solutions.

[0005] The utility model provides an analog controllable output circuit, comprising an isolator, wherein the isolator is respectively connected to an analog switch and a power module, the analog switch is also connected to a voltage-dividing resistor, and the isolator, the power module, the analog switch and the voltage-dividing resistor are all connected to a CPCI connector.

[0006] The D3 pin, E2 pin, A2 pin, B3 pin, D2 pin and B2 pin of the power module are all connected to the positive electrode of the polar tantalum capacitor CA1, one end of the capacitor C160 and the capacitor C161, and then connected to the positive electrode of the 5V power supply, the C5 pin is connected to the 3V3 power supply ground, the C4 pin is grounded through a resistor R260, the D1 pin and the E1 pin are all connected to the positive electrode of the polar tantalum capacitor CA2 and one end of the capacitor C162, and then connected to the positive electrode of the 3V3 power supply, the E4 pin and the A4 pin are connected to the 3V3 power supply ground through resistors R262 and R261 respectively, and the B5 pin, D5 pin, C1 pin and C2 pin are all connected to the 3V3 power supply ground; the negative electrode of the polar tantalum capacitor CA1, the other end of the capacitor C160 and the capacitor C161, the negative electrode of the polar tantalum capacitor CA2 and the other end of the capacitor C162 are all connected to the 3V3 power supply ground.

[0007] The VDD1 pin of the isolator is connected to the positive electrode of the polar tantalum capacitor CA3 and one end of the capacitor C163, and then connected to the positive electrode of the 3V3 power supply. The GND1 pin is connected to the negative electrode of the polar tantalum capacitor CA3 and the other end of the capacitor C163, and then connected to the 3V3 power supply ground. The VDD2 pin is connected to the positive electrode of the polar tantalum capacitor CA4 and one end of the capacitor C164, and then connected to the positive electrode of the 5V power supply. The GND2 pin is connected to the negative electrode of the polar tantalum capacitor CA4 and the other end of the capacitor C164, and then connected to the 5V power supply ground. The VE2 pin is connected to one end of the capacitor C164 through a resistor R. The VIA pin, VIB pin, VIC pin, and VID pin are respectively connected to the A00 pin, A01 pin, A02 pin, and A03 pin of the CPCI connector.

[0008] The voltage-dividing resistor includes a resistor R1 , one end of which is connected to the ADIN pin of the CPCI connector, and the other end of which is connected to the 5V power ground via a resistor R2 and a capacitor C1 .

[0009] The VDD pin of the analog switch is connected to the positive electrode of the 12V power supply, the A0 pin, the A1 pin, the A2 pin, and the A3 pin are respectively connected to the VOA pin, the VOB pin, the VOC pin, and the VOD pin of the isolator, the VSS pin is connected to the 12V power supply ground, the GND pin is connected to the 5V power supply ground, the OUT pin is connected to the INAD1 pin of the CPCI connector, and the S1 pin, the S2 pin, the S3 pin, the S4 pin, the S5 pin, the S6 pin, the S7 pin, the S8 pin, the S9 pin, the S10 pin, the S11 pin, the S12 pin, the S3 pin, the S14 pin, the S15 pin, and the S16 pin are all connected to the other end of the resistor R2.

[0010] The CPCI connector is connected to a 5V power supply to supply power to the power module and the isolator respectively.

[0011] The resistor R260 , the resistor R261 and the resistor R262 are all thick film fixed resistors.

[0012] The beneficial effects of the utility model are: providing 128-way voltage-divided analog input interface and 8-way simultaneously controllable analog output interface, realizing controllable analog output, using domestic analog switches, isolators and power modules to realize board functions, and reducing the constraints of foreign chips. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the principle of the utility model;

[0014] Figure 2 It is a circuit diagram of a power module of the utility model;

[0015] Figure 3It is the circuit diagram of the isolator of the utility model;

[0016] Figure 4 It is a voltage-dividing resistor circuit diagram of the utility model;

[0017] Figure 5 This is a circuit diagram of an analog switch of the utility model. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0019] like Figure 1 As shown, an analog quantity controllable output circuit includes an isolator, the isolator is connected to an analog switch and a power module respectively, the analog switch is also connected to a voltage divider resistor, and the isolator, the power module, the analog switch and the voltage divider resistor are all connected to the CPCI connector. A standard 3U board developed based on FPGA provides 128-way voltage divider analog quantity input interfaces and 8-way analog quantity output interfaces that can be controlled at the same time, so as to realize analog quantity controllable output; domestic devices are selected to realize the functions of the board, and data information is transmitted with the CPU board through the data bus, the address bus and the control bus. The voltage divider resistor divides the input analog quantity and inputs it to the analog switch input port. Each analog switch inputs up to 16 analog quantities. The control signal is input to the analog switch control port after passing through the isolator. The external CPU controls the analog switch output port to output analog quantity signals through the control signal. Each analog switch can control one analog quantity among the 16 analog quantity inputs to output, so as to realize analog quantity controllable output.

[0020] like Figure 2 The power module circuit diagram of the utility model is shown; the D3 pin, E2 pin, A2 pin, B3 pin, D2 pin and B2 pin of the power module are all connected to the positive electrode of the polar tantalum capacitor CA1, one end of the capacitor C160 and the capacitor C161, and then connected to the positive electrode of the 5V power supply, the C5 pin is connected to the 3V3 power supply ground, the C4 pin is grounded through a resistor R260, the D1 pin and the E1 pin are all connected to the positive electrode of the polar tantalum capacitor CA2 and one end of the capacitor C162, and then connected to the positive electrode of the 3V3 power supply, the E4 pin and the A4 pin are connected to the 3V3 power supply ground through resistors R262 and R261 respectively, and the B5 pin, D5 pin, C1 pin and C2 pin are all connected to the 3V3 power supply ground; the negative electrode of the polar tantalum capacitor CA1, the other end of the capacitor C160 and the capacitor C161, the negative electrode of the polar tantalum capacitor CA2 and the other end of the capacitor C162 are all connected to the 3V3 power supply ground.

[0021] like Figure 3The isolator circuit diagram of the utility model is shown; the VDD1 pin of the isolator is connected to the positive electrode of the polar tantalum capacitor CA3 and one end of the capacitor C163, and then connected to the positive electrode of the 3V3 power supply; the GND1 pin is connected to the negative electrode of the polar tantalum capacitor CA3 and the other end of the capacitor C163, and then connected to the 3V3 power supply ground; the VDD2 pin is connected to the positive electrode of the polar tantalum capacitor CA4 and one end of the capacitor C164, and then connected to the positive electrode of the 5V power supply; the GND2 pin is connected to the negative electrode of the polar tantalum capacitor CA4 and the other end of the capacitor C164, and then connected to the 5V power supply ground; the VE2 pin is connected to one end of the capacitor C164 through a resistor R; the VIA pin, the VIB pin, the VIC pin, and the VID pin are respectively connected to the A00 pin, the A01 pin, the A02 pin, and the A03 pin of the CPCI connector.

[0022] like Figure 4 The voltage-dividing resistor circuit diagram of the utility model is shown; the voltage-dividing resistor includes a resistor R1, one end of the resistor R1 is connected to the ADIN pin of the CPCI connector, and the other end is connected to the 5V power supply ground through a resistor R2 and a capacitor C1 respectively.

[0023] like Figure 5 The figure shows the analog switch circuit diagram of the utility model; the VDD pin of the analog switch is connected to the positive electrode of the 12V power supply, the A0 pin, the A1 pin, the A2 pin, and the A3 pin are respectively connected to the VOA pin, the VOB pin, the VOC pin, and the VOD pin of the isolator, the VSS pin is connected to the 12V power ground, the GND pin is connected to the 5V power ground, the OUT pin is connected to the INAD1 pin of the CPCI connector, and the S1 pin, the S2 pin, the S3 pin, the S4 pin, the S5 pin, the S6 pin, the S7 pin, the S8 pin, the S9 pin, the S10 pin, the S11 pin, the S12 pin, the S3 pin, the S14 pin, the S15 pin, and the S16 pin are all connected to the other end of the resistor R2.

[0024] The CPCI connector is connected to a 5V power supply to supply power to the power module and the isolator respectively.

[0025] The resistor R260 , the resistor R261 and the resistor R262 are all thick film fixed resistors.

[0026] The utility model provides an analog quantity controllable output circuit, which provides 128-way voltage-divided analog quantity input interfaces and 8-way analog quantity output interfaces that can be controlled at the same time, realizes analog quantity controllable output, adopts domestic analog switches, isolators and power supply modules to realize board functions, and can reduce the constraints of foreign chips.

Claims

1. An analog controllable output circuit, characterized in that: It includes an isolator, the isolator is connected to an analog switch and a power module respectively, the analog switch is also connected to a voltage-dividing resistor, and the isolator, the power module, the analog switch and the voltage-dividing resistor are all connected to a CPCI connector; The VDD pin of the analog switch is connected to the positive electrode of the 12V power supply, the A0 pin, the A1 pin, the A2 pin, and the A3 pin are respectively connected to the VOA pin, the VOB pin, the VOC pin, and the VOD pin of the isolator, the VSS pin is connected to the 12V power supply ground, the GND pin is connected to the 5V power supply ground, the OUT pin is connected to the INAD1 pin of the CPCI connector, and the S1 pin, the S2 pin, the S3 pin, the S4 pin, the S5 pin, the S6 pin, the S7 pin, the S8 pin, the S9 pin, the S10 pin, the S11 pin, the S12 pin, the S3 pin, the S14 pin, the S15 pin, and the S16 pin are all connected to the other end of the resistor R2.

2. The analog controllable output circuit according to claim 1, characterized in that: The D3 pin, E2 pin, A2 pin, B3 pin, D2 pin and B2 pin of the power module are all connected to the positive electrode of the polar tantalum capacitor CA1, one end of the capacitor C160 and the capacitor C161, and then connected to the positive electrode of the 5V power supply, the C5 pin is connected to the 3V3 power supply ground, the C4 pin is grounded through a resistor R260, the D1 pin and the E1 pin are all connected to the positive electrode of the polar tantalum capacitor CA2 and one end of the capacitor C162, and then connected to the positive electrode of the 3V3 power supply, the E4 pin and the A4 pin are connected to the 3V3 power supply ground through resistors R262 and R261 respectively, and the B5 pin, D5 pin, C1 pin and C2 pin are all connected to the 3V3 power supply ground; the negative electrode of the polar tantalum capacitor CA1, the other end of the capacitor C160 and the capacitor C161, the negative electrode of the polar tantalum capacitor CA2 and the other end of the capacitor C162 are all connected to the 3V3 power supply ground.

3. The analog controllable output circuit according to claim 1, characterized in that: The VDD1 pin of the isolator is connected to the positive electrode of the polar tantalum capacitor CA3 and one end of the capacitor C163, and then connected to the positive electrode of the 3V3 power supply. The GND1 pin is connected to the negative electrode of the polar tantalum capacitor CA3 and the other end of the capacitor C163, and then connected to the 3V3 power supply ground. The VDD2 pin is connected to the positive electrode of the polar tantalum capacitor CA4 and one end of the capacitor C164, and then connected to the positive electrode of the 5V power supply. The GND2 pin is connected to the negative electrode of the polar tantalum capacitor CA4 and the other end of the capacitor C164, and then connected to the 5V power supply ground. The VE2 pin is connected to one end of the capacitor C164 through a resistor R. The VIA pin, VIB pin, VIC pin, and VID pin are respectively connected to the A00 pin, A01 pin, A02 pin, and A03 pin of the CPCI connector.

4. The analog controllable output circuit according to claim 1, characterized in that: The voltage-dividing resistor includes a resistor R1 , one end of which is connected to the ADIN pin of the CPCI connector, and the other end of which is connected to the 5V power ground via a resistor R2 and a capacitor C1 .

5. The analog controllable output circuit according to claim 1, characterized in that: The CPCI connector is connected to a 5V power supply to supply power to the power module and the isolator respectively.

6. The analog controllable output circuit according to claim 2, characterized in that: The resistor R260 , the resistor R261 and the resistor R262 are all thick film fixed resistors.

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