CN104579297A - Multifunctional transmitting hybrid integrated circuit - Google Patents

Abstract

The invention relates to a multifunctional transmitting hybrid integrated circuit. An excited signal is input to a signal conditioning chip; a secondary side signal is input to a first amplifier for amplification; the amplified signal is input to the signal conditioning chip; after the signal conditioning chip is used for modulating the amplified secondary side signal and a basic signal, and then carrying out demodulating and amplifying; the demodulated and amplified signal is input to a second amplifier for filtration; the filtered signal is input to a third amplifier after the filtration; after the filtered signal and a reference signal are added by the third amplifier, a final output signal is obtained. The multifunctional transmitting hybrid integrated circuit is high in anti-interference capability and anti-static capability, wide in output signal range, and high in reliability and integration, and can meet the transmitting requirements of various models of sensors such as a displacement sensor and a pressure difference sensor. Bias voltage of the multifunctional transmitting hybrid integrated circuit is independent of supply voltage.

Description

Hybrid integrated circuit is sent in a kind of multi-functional change

Technical field

The present invention relates to a kind of hybrid integrated circuit, be specifically related to a kind of servomechanism displacement, pressure reduction, pressure signal conversion hybrid integrated circuit.

Background technology

The matching used displacement of servomechanism in the past, pressure reduction, pressure inverting hybrid integrated circuit adopted 0102a, 0102b, 0103, the multiple hybrid integrated circuit such as 0103a, 0103c.Due to technical conditions restriction, hybrid integrated circuit in the past exists that output stability is low, temperature drift is large, antijamming capability is weak, becomes and send the Varied problems such as function singleness, the external core devices SE5521 simultaneously used due to part transmitter part stops production, therefore needs domesticize novel high-precision, highly reliable, the multi-functional hybrid integrated circuit of high stable of development to replace hybrid integrated circuit in the past.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of multi-functional change and send hybrid integrated circuit, realizes accurate, stabilization transform to multi-signals such as servomechanism displacement, pressure reduction, pressure.

For solving the problem, hybrid integrated circuit is sent in multi-functional change of the present invention, signal condition chip input excited signal signal, first amplifier input secondary side signal, input signal conditioning chip after first amplifier amplifies secondary side signal, after signal condition chip amplifies the secondary side signal after amplification and basis signal modulation /demodulation again, input the second amplifier, second amplifier inputs the 3rd amplifier to after signal filtering, 3rd amplifier, to through the signal of the second amplifier process and reference signal addition process, obtains final output signal.

Described signal condition chip, its pin P1 leads to ic pin Q11, pin P2, P13, P18 leads to into circuit pin Q15, pin P3, P14, P17 leads to ic pin Q16, pin P5, P6 is connected by resistance R1, pin P7, P8 is connected by electric capacity C1, pin P10, P11 is connected by electric capacity C2, pin P16, P24 ground connection, pin P19, P20 is connected by electric capacity C3, pin P21, P22 is connected by electric capacity C4, pin P22, P23 is connected by electric capacity C5, pin P22 leads to ic pin Q10, pin P23 leads to ic pin Q9, pin P26 leads to ic pin Q13, pin P27 leads to ic pin Q14, pin P28 leads to ic pin Q12.

Described first amplifier, its inverting input leads to ic pin Q1 by resistance R2, and inverting input leads to ic pin Q2 by resistance R2, R12, and inverting input is connected to output by resistance R3.In-phase input end is by resistance R11 ground connection and lead to ic pin Q7, in-phase input end leads to ic pin Q3 by resistance R4, in-phase input end leads to ic pin Q4 by resistance R4, R13, output connection signal conditioning chip pin P15.

Described second amplifier, its in-phase input end is connected to signal condition chip pin P23 by resistance R6, R5, in-phase input end is connected to output by resistance R6, electric capacity C7, and in-phase input end is by electric capacity C6 ground connection, and inverting input connects input and leads to ic pin Q8.

Described 3rd amplifier, its in-phase input end connects the second amplifier out by resistance R8, and in-phase input end leads to ic pin Q5 by resistance R9, and inverting input is connected to output, leads to ic pin Q6.

The resistance of described circuit all adopts thick-film resistor.

The model of described signal condition chip is AD698.

The present invention adopts two imbalance adjustment end to replace single imbalance adjustment end, and bias voltage and supply voltage have nothing to do, by parallel high-accuracy resistance quick accurate adjustment output signal zero-bit; Adopt complete differential amplifier to substitute sign-changing amplifier, effectively suppress common mode disturbances, improve circuit anti-interference ability; Adopt two-stage multiplication factor shaping modes, can realize outputing signal on a large scale with high accuracy range-adjusting, requirement is sent in the change that can meet the Multiple Type such as displacement, pressure reduction transducer; By optimizing and revising Q-Value in Electric Circuit, the adjustment resistance of R6 and the capacitance of C6 effectively improve the frequency response index of circuit, and improve dynamic characteristic, it is Amplitude Ration 1 ± 0.01 that the dynamic characteristic after improvement can realize amplitude-frequency characteristic, and phase-frequency characteristic is delayed phase≤3 °; By external passive component determination magnet excitation frequency and amplitude, magnet excitation frequency and amplitude are determined respectively by resistance and electric capacity, improve the stability of magnet excitation frequency and amplitude; By two synchronous demodulation levels, primary and secondary voltage is decoded, decoder determines the ratio of output voltage and input queued switches voltage, output signal transfer function is ratio parameter decision thus directly, the impact that elimination magnet excitation frequency and amplitude change export signal, strengthens the stability that signal exports; Adopt thick-film resistor substitution film resistance, improve the antistatic effect of circuit; Adopt metal dual-in-line shallow chamber case package, whole components and parts adopt Surface Mount welding, have high-reliability and high integration.

Accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:

Fig. 1 is that change send hybrid integrated circuit change to send theory diagram.

Fig. 2 is that hybrid integrated circuit elementary diagram is sent in change.

Fig. 3 is that hybrid component Parameter Map is sent in change.

In figure: U1 is signal condition chip, U2 is the first amplifier, and U3 is the second amplifier, and U4 is the 3rd amplifier.

Embodiment

As shown in Figure 1, hybrid integrated circuit produces effective value 3.8V, the AC excitation signal of frequency 8KHz sends into transducer, by the former limit of transducer, secondary induction convert out secondary side signal enter to amplify after with excited signal enters modulate, produces after demodulation and d. c. voltage signal that displacement, pressure difference signal are proportional, d. c. voltage signal produces final output signal after amplification and second-order filter.Output signal and convert through adder by applying reference voltage.

As shown in Figure 2, for the connection layout of circuit, comprise signal condition chip U1, its pin P1 leads to ic pin Q11, signal condition chip U1 pin P2, P13, P18 leads to into circuit pin Q15, signal condition chip U1 pin P3, P14, P17 leads to ic pin Q16, the P5 of signal condition chip U1, P6 pin is connected by resistance R1, the P7 of signal condition chip U1, P8 pin is connected by electric capacity C1, the P10 of signal condition chip U1, P11 pin is connected by electric capacity C2, the P16 of signal condition chip U1, P24 pin ground connection, the P19 of signal condition chip U1, P20 pin is connected by electric capacity C3, the P21 of signal condition chip U1, P22 pin is connected by electric capacity C4, the P22 of signal condition chip U1, P23 pin is connected by electric capacity C5, 22 pins of signal condition chip U1 lead to ic pin Q10, the P23 pin of signal condition chip U1 leads to ic pin Q9, , pin P26 leads to ic pin Q13, pin P27 leads to ic pin Q14, pin P28 leads to ic pin Q12, ic pin Q1, Q2 is connected by resistance R12, ic pin Q1 is connected to amplifier U2 inverting input by resistance R2, U2 reverse input end is connected to U2 output and signal condition chip U1 pin P15 by resistance R3, ic pin Q3, Q4 is connected by resistance R13, ic pin Q3 is connected to U2 in-phase input end by resistance R4, U2 in-phase input end is by resistance R11 ground connection, ic pin Q7 is ground pin, signal condition chip U1 pin P23 is by resistance R5, R6 is connected to amplifier U3 in-phase input end, signal condition chip U1 pin P23 is by resistance R5, electric capacity C7 is connected to amplifier U3 output, amplifier U3 in-phase input end is by electric capacity C6 ground connection, U3 inverting input is connected with wire of output terminal, lead to ic pin Q8, U3 output is connected to amplifier U4 in-phase input end by resistance R8, U4 in-phase input end leads to ic pin 5 by resistance R9, amplifier U4 inverting input wire connects output and leads to ic pin Q6.

This hybrid integrated circuit is by external passive component determination magnet excitation frequency and amplitude, magnet excitation frequency is determined by electric capacity C1, excitatory amplitude is determined by resistance R1, this hybrid integrated circuit adopts two imbalance adjustment end, bias voltage and supply voltage have nothing to do, by parallel high-accuracy resistance quick accurate adjustment output signal zero-bit.Namely pick out two zero-regulator resistors R14, R15 from limb Q13, Q14 ,-15V is received in unification, is connected from limb Q9, Q10 by resistance R16.Now, its zero offset:

$V_{\mathrm{os}}=1.2V\×R16\×(\frac{1}{R14+2\mathrm{k\Ω}}-\frac{1}{R15+2\mathrm{k\Ω}})$

R14, R15 are zero-regulator resistor, and R16 is gain resistor, and 1.2V is inner voltage reference, and Vos and supply voltage have nothing to do, therefore zero-bit is more stable.

As shown in Figure 3, be the type and spec of the parts of circuit and the size of resistance and electric capacity.Wherein signal condition chip U1 is AD698, amplifier U2, U3, U4 are op07, resistance R1 is 14.15k Ω, R2 be 10k Ω, R3 be 71.5k Ω, R4 be 10k Ω, R5 be 10k Ω, R6 be 39k Ω, R8 be 18k Ω, R9 be 18k Ω, R11 be 71.5k Ω, R12 be 60.4k Ω, R13 be 60.4k Ω, C1 be 4350pF, C2 be 0.01 μ F, C3 be 0.01 μ F, C4 be 0.01 μ F, C5 be 470pF, C6 be 470pF, C7 is 0.01 μ F.

During work, when secondary output signal needs 7 times to amplify, contact Q1, Q3 connect transducer secondary and export; When secondary output signal needs 1 times to amplify, contact Q2, Q4 connect transducer secondary and export; Contact Q5 connects reference voltage, when output signal needs to use when adder converts; Contact Q6 is voltage output point after adder conversion; Contact Q7 is external ground connection; Contact Q8 is voltage output point after secondary filtering; Contact Q9, Q10 are by extraneous gain resistor R16; The external 15V voltage of contact Q11; Contact Q13, Q14 respectively connect zero-regulator resistor R14, R15 composition parallel circuits and are connected serially to contact Q11 again; Contact Q15, Q16 connect the former limit of transducer.

Claims (7)

1. hybrid integrated circuit is sent in a multi-functional change, it is characterized in that: secondary side signal connects the first amplifier (U2) input, primary coil connects signal condition chip (U1) input, first amplifier (U2) exports termination signal condition chip (U1) another input, signal condition chip (U1) exports termination second amplifier (U3) in-phase input end, second amplifier (U3) exports termination the 3rd amplifier (U4) in-phase input end, and the 3rd amplifier (U4) output signal is final output signal; Signal condition chip (U1) inputs excited signal, first amplifier (U2) inputs secondary side signal, input signal conditioning chip (U1) after first amplifier (U2) amplifies secondary side signal, after signal condition chip (U1) amplifies the secondary side signal after amplification and basis signal modulation /demodulation again, input the second amplifier (U3), second amplifier (U3) inputs the 3rd amplifier (U4) to after signal filtering, 3rd amplifier (U4), to the signal processed through the second amplifier (U3) and reference signal addition process, obtains final output signal.

2. send hybrid integrated circuit according to multi-functional change according to claim 1, it is characterized in that: described signal condition chip (U1), its pin P1 leads to ic pin Q11, pin P2, P13, P18 leads to into circuit pin Q15, pin P3, P14, P17 leads to ic pin Q16, pin P5, P6 is connected by resistance R1, pin P7, P8 is connected by electric capacity C1, pin P10, P11 is connected by electric capacity C2, pin P16, P24 ground connection, pin P19, P20 is connected by electric capacity C3, pin P21, P22 is connected by electric capacity C4, pin P22, P23 is connected by electric capacity C5, pin P22 leads to ic pin Q10, pin P23 leads to ic pin Q9, pin P26 leads to ic pin Q13, pin P27 leads to ic pin Q14, pin P28 leads to ic pin Q12.

3. send hybrid integrated circuit according to multi-functional change according to claim 1, it is characterized in that: described first amplifier (U2), its inverting input leads to ic pin Q1 by resistance R2, inverting input leads to ic pin Q2 by resistance R2, R12, and inverting input is connected to output by resistance R3.In-phase input end is by resistance R11 ground connection and lead to ic pin Q7, in-phase input end leads to ic pin Q3 by resistance R4, in-phase input end leads to ic pin Q4 by resistance R4, R13, output connection signal conditioning chip (U1) pin P15.

4. send hybrid integrated circuit according to multi-functional change according to claim 1, it is characterized in that: described second amplifier (U3), its in-phase input end is connected to signal condition chip (U1) pin P23 by resistance R6, R5, in-phase input end is connected to output by resistance R6, electric capacity C7, in-phase input end is by electric capacity C6 ground connection, and inverting input connects input and leads to ic pin Q8.

5. send hybrid integrated circuit according to multi-functional change according to claim 1, it is characterized in that: described 3rd amplifier (U4), its in-phase input end connects the second amplifier (U3) output by resistance R8, in-phase input end leads to ic pin Q5 by resistance R9, inverting input is connected to output, leads to ic pin Q6.

6. send hybrid integrated circuit according to the high accuracy described in claim 2,3,4 or 5, highly reliable, the multi-functional change of high stable, it is characterized in that: the resistance of described circuit all adopts thick-film resistor.

7. send hybrid integrated circuit according to high accuracy according to claim 1, highly reliable, the multi-functional change of high stable, it is characterized in that: the model of described signal condition chip (U1) is AD698.