CN206759403U - One kind 12 leads electrocardiosignal hardware handles circuit - Google Patents

Abstract

The utility model discloses one kind 12 to lead electrocardiosignal hardware handles circuit, including Wilson's network driven-right-leg circuit, resisting high frequency electric knife interference circuit, gain control circuit, lead-fail detector detection circuit and system overload decision circuitry, the Wilson's network driven-right-leg circuit, resisting high frequency electric knife interference circuit, gain control circuit, lead-fail detector detection circuit and system overload decision circuitry are sequentially connected.The utility model uses more cheap AD8226 chips, not only reduces the complexity of whole system, and reduce the power consumption and cost of whole system so that whole system component use greatly reduces, and is more reduction of the wiring difficulty of whole pcb board.

Description

One kind 12 leads electrocardiosignal hardware handles circuit

Technical field

A kind of signal processing circuit is the utility model is related to, is specifically that one kind 12 leads electrocardiosignal hardware handles circuit.

Background technology

Existing 12 lead electrocardiogram signal processing circuit mostly using AD620 as pre-amplifier, or using integrated core Piece ADS1298 as AFE(analog front end), using positive and negative 12V powered by its AFE(analog front end), rear class using add the method for bias voltage come Electrocardiosignal is raised, so not only increases the power consumption of whole system, and causes whole system supply voltage disunity, is needed LDO mu balanced circuits are frequently added, add whole system cost, therefore have much room for improvement.

Utility model content

The purpose of this utility model is that providing one kind 12 leads electrocardiosignal hardware handles circuit, to solve above-mentioned background skill The problem of being proposed in art.

To achieve the above object, the utility model provides following technical scheme：

One kind 12 leads electrocardiosignal hardware handles circuit, including Wilson's network driven-right-leg circuit, resisting high frequency electric knife are done Disturb circuit, gain control circuit, lead-fail detector detection circuit and system overload decision circuitry, the Wilson's network right leg drive Circuit, resisting high frequency electric knife interference circuit, gain control circuit, lead-fail detector detection circuit and system overload decision circuitry connect successively Connect.

As further program of the utility model：Also include power supply circuit, power supply circuit uses AD8226 chip controls.

As further program of the utility model：The gain control circuit includes transformer T1, transformer T2, resistance R1, electric capacity C1, triode VT1 and potentiometer RP1, described electric capacity C1 one end connect input signal Vi and transformer T1 coils respectively L1, transformer T1 coil the L1 other end connect the electric capacity C1 other ends, and transformer T1 coil L1 taps connect transformer T2 lines respectively Enclose L3 taps, electric capacity C8, resistance R3 and power supply VCC, transformer T2 coil L3 one end connection electric capacity C3, electric capacity C3 other ends difference The transformer T2 coil L3 other ends and triode VT1 colelctor electrodes are connected, triode VT1 base stages connection transformer T1 coil L2, is become The depressor T1 coil L2 other ends connect electric capacity C2 and resistance R1 respectively, and it is another that the resistance R1 other ends connect electric capacity C5, resistance R3 respectively One end and triode VT2 colelctor electrodes, triode VT2 base stages connect the electric capacity C8 other ends and transformer T2 coil L4, transformation respectively The device T2 coil L4 other ends connect electric capacity C4, and the triode VT2 emitter stages connect resistance R2 and electric capacity C6 respectively, and resistance R2 is another One end connection potentiometer RP1 one end, the potentiometer RP1 other ends connect the electric capacity C6 other ends, the electric capacity C5 other ends, triode respectively VT1 emitter stages and the electric capacity C2 other ends are simultaneously grounded, and potentiometer RP1 slide plates pass through electric capacity C7 connection output end vos.

As the utility model further scheme：The power supply VCC is the 5V voltages that the power supply circuit provides.

Compared with prior art, the beneficial effects of the utility model are：The utility model uses more cheap AD8226 Chip, not only reduces the complexity of whole system, and reduces the power consumption and cost of whole system so that whole system member Device use greatly reduces, and is more reduction of the wiring difficulty of whole pcb board.

Brief description of the drawings

Fig. 1 is 12 structural representations for leading electrocardiosignal hardware handles circuit.

Fig. 2 is 12 circuit diagrams for leading gain control circuit in electrocardiosignal hardware handles circuit.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belong to the scope of the utility model protection.

Refer to Fig. 1~2, in the utility model embodiment, one kind 12 leads electrocardiosignal hardware handles circuit, including Weir Inferior network driven-right-leg circuit, resisting high frequency electric knife interference circuit, gain control circuit, lead-fail detector detection circuit and system overload Decision circuitry, the Wilson's network driven-right-leg circuit, resisting high frequency electric knife interference circuit, gain control circuit, lead-fail detector Detection circuit and system overload decision circuitry are sequentially connected.

Also include power supply circuit, power supply circuit uses AD8226 chip controls.

The gain control circuit includes transformer T1, transformer T2, resistance R1, electric capacity C1, triode VT1 and potentiometer RP1, described electric capacity C1 one end connect input signal Vi and transformer T1 coil L1, the connection of the transformer T1 coil L1 other ends respectively The electric capacity C1 other ends, transformer T1 coil L1 taps connect transformer T2 coil L3 taps, electric capacity C8, resistance R3 and power supply respectively VCC, transformer T2 coil L3 one end connect electric capacity C3, and the electric capacity C3 other ends connect the transformer T2 coil L3 other ends and three respectively Pole pipe VT1 colelctor electrodes, triode VT1 base stages connection transformer T1 coil L2, the transformer T1 coil L2 other ends connect electricity respectively Hold C2 and resistance R1, the resistance R1 other ends connect electric capacity C5, the resistance R3 other ends and triode VT2 colelctor electrodes, triode respectively VT2 base stages connect the electric capacity C8 other ends and transformer T2 coil L4, transformer T2 coil L4 other ends connection electric capacity C4, institute respectively State triode VT2 emitter stages and connect resistance R2 and electric capacity C6, resistance R2 other ends connection potentiometer RP1 one end, potentiometer respectively The RP1 other ends connect the electric capacity C6 other ends, the electric capacity C5 other ends, triode VT1 emitter stages and the electric capacity C2 other ends and connect respectively Ground, potentiometer RP1 slide plates pass through electric capacity C7 connection output end vos.

The power supply VCC is the 5V voltages that the power supply circuit provides.Input signal Vi is intermediate-freuqncy signal, and VT2 is detection Triode, when being added to VT2 base stages after the coupled amplification of signal, because VT2 base voltages are very low, intermediate-freuqncy signal can only be amplified Positive half cycle, positive half-cycle signal export after VT2 amplifies from colelctor electrode, because transistor collector and base stage are paraphase relations, institute Negative half-cycle signal is changed into the output of VT2 colelctor electrodes, the intermediate frequency component in negative half-cycle signal is filtered out by C5, remaining to contain flip-flop Audio signal, the audio signal in the signal filters out by C6 again, and only surplus flip-flop, changes the base stage that DC voltage is added to VT1, Change VT1 base voltages to control VT1 gain.If input signal Vi amplitudes are big, detection tube VT2 bases are sent to after VT1 amplifies The signal amplitude of pole is big, and the negative half-cycle signal amplitude of VT2 collector outputs is big, the negative direct current obtained after C5, R1, C6 filtering Voltage is lower, and the voltage is added to VT1 base stage, declines VT1 base voltages, and the intermediate-freuqncy signal of such VT1 outputs reduces, amplitude Return to normal range (NR)；The big situation of input signal Vi amplitudes is with above-mentioned flow on the contrary, equally making amplitude return to normal range (NR)

It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and And in the case of without departing substantially from spirit or essential attributes of the present utility model, it can realize that this practicality is new in other specific forms Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation Involved claim.

Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art It is appreciated that other embodiment.

Claims (4)

1. one kind 12 leads electrocardiosignal hardware handles circuit, it is characterised in that including Wilson's network driven-right-leg circuit, anti-height Frequency electric knife interference circuit, gain control circuit, lead-fail detector detection circuit and system overload decision circuitry, the Wilson's network Driven-right-leg circuit, resisting high frequency electric knife interference circuit, gain control circuit, lead-fail detector detection circuit and system overload judge electricity Road is sequentially connected.

2. according to claim 1 12 lead electrocardiosignal hardware handles circuit, it is characterised in that also including power supply circuit, Power supply circuit uses AD8226 chip controls.

3. according to claim 1 12 lead electrocardiosignal hardware handles circuit, it is characterised in that the gain control circuit Connect respectively including transformer T1, transformer T2, resistance R1, electric capacity C1, triode VT1 and potentiometer RP1, described electric capacity C1 one end Connect input signal Vi and transformer T1 coil L1, the transformer T1 coil L1 other ends connection electric capacity C1 other ends, transformer T1 lines Circle L1 taps connect transformer T2 coil L3 taps, electric capacity C8, resistance R3 and power supply VCC, transformer T2 coil L3 one end respectively Electric capacity C3 is connected, the electric capacity C3 other ends connect the transformer T2 coil L3 other ends and triode VT1 colelctor electrodes, triode respectively VT1 base stages connect transformer T1 coil L2, and the transformer T1 coil L2 other ends connect electric capacity C2 and resistance R1 respectively, and resistance R1 is another One end connects electric capacity C5, the resistance R3 other ends and triode VT2 colelctor electrodes respectively, and triode VT2 base stages connect electric capacity C8 respectively The other end and transformer T2 coil L4, transformer T2 coil L4 other ends connection electric capacity C4, the triode VT2 emitter stages difference Resistance R2 and electric capacity C6, resistance R2 other ends connection potentiometer RP1 one end are connected, the potentiometer RP1 other ends connect electric capacity respectively The C6 other ends, the electric capacity C5 other ends, triode VT1 emitter stages and the electric capacity C2 other ends are simultaneously grounded, and potentiometer RP1 slide plates pass through electricity Hold C7 connection output end vos.

4. according to claim 2 12 lead electrocardiosignal hardware handles circuit, it is characterised in that the power supply VCC is institute The 5V voltages of power supply circuit offer are provided.