CN103336159A - Analog signal isolating circuit based on rotary capacitor - Google Patents
Analog signal isolating circuit based on rotary capacitor Download PDFInfo
- Publication number
- CN103336159A CN103336159A CN2013102553033A CN201310255303A CN103336159A CN 103336159 A CN103336159 A CN 103336159A CN 2013102553033 A CN2013102553033 A CN 2013102553033A CN 201310255303 A CN201310255303 A CN 201310255303A CN 103336159 A CN103336159 A CN 103336159A
- Authority
- CN
- China
- Prior art keywords
- pin
- capacitor
- base pin
- input
- dpdt relay
- 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.)
- Pending
Links
Images
Landscapes
- Networks Using Active Elements (AREA)
Abstract
The invention discloses an analog signal isolating circuit based on a rotary capacitor. The circuit is characterized by comprising a double-pole double-throw relay K and a capacitor C, wherein a base pin K1 of the double-pole double-throw relay K is connected with one end of the capacitor C, a base pin K4 is connected with the other end of the capacitor C, a base pin K8 is connected with the ground, a base pin K7 inputs a sampling square signal; a base pin K2 is connected with an input end positive pole (3), a base pin K5 is connected with an input end negative pole (4); a base pin K3 is connected with an output end positive pole (1), a base pin K6 is connected with an output end negative pole (2). The structure of the invention is low in cost, is high in degree of linearity, and can replace a linear optical coupler and realize isolating transmission of the analog signal.
Description
Technical field
The invention belongs to field of signal transmissions, relate to a kind of simulating signal buffer circuit based on rotation electric capacity, be applicable to and isolate simulating signal, and the transmission line degree is required very high field.Infrastructure cost of the present invention is cheap, linearity height, and alternative linear optical coupling is realized the isolation transmission of simulating signal.
Background technology
In many circuit, need input, output signal are isolated, with noise isolation, provide common mode inhibition capacity.On logical circuit, in the solid switch, trigger circuit, pulse amplifying circuit pressure-controlled, be widely used, can replace transformer, replace the contact relay and be used for multiple occasion such as A/D circuit.
Present known isolation solution is adopt linear optical coupling, but linear optical coupling is expensive, can increase the cost of system, and linear optical coupling output to be differential signal.The back need connect an instrument amplifier differential signal is converted to the common mode single-ended signal, makes system more complicated and expensive.
Summary of the invention
The objective of the invention is to design a kind of simulating signal buffer circuit based on rotation electric capacity, realize low-cost, high linearity simulating signal isolation transmission with dpdt relay, electric capacity.
Technical scheme of the present invention is: a kind of simulating signal buffer circuit based on rotation electric capacity is characterized in that comprising dpdt relay K, capacitor C; Wherein the pin K1 of dpdt relay K links to each other with an end of capacitor C, and pin K4 links to each other with the other end of capacitor C, and pin K8 connects ground, pin K7 input sample square-wave signal; Pin K2 connects input anode, and pin K5 connects input cathode; Pin K3 connects output head anode, and pin K6 connects negative pole of output end.
The pin K7 input sample square-wave signal of described dpdt relay K, control dpdt relay pin K1 and K2, K3 take turns conducting, and K4 and K5, K6 take turns conducting.
Capacitor C is connected with input end Vi under the control of dpdt relay K, output end vo takes turns conducting with the sampling square wave frequency.
Principle of work of the present invention is: under the control of dpdt relay, electric capacity is connected with input end Vi, output end vo takes turns conducting with the sampling square wave frequency, Vi gives the capacitor C charge or discharge when switch switches to input end Vi side, after an of short duration transient process, the voltage at electric capacity two ends should be identical with Vi, when switch switches to the output end vo side, if it is infinitely great that loaded impedance reaches, because the accumulation of energy function of capacitor C, Vo should with switch before Vi equate, thereby finished the isolation translation function of Vi.
Advantage of the present invention is: a kind of simulating signal buffer circuit based on rotation electric capacity of the present invention, realize the simulating signal isolation with dpdt relay, electric capacity, and cost is low, the linearity is high, and realization is simple, the reliability height.
Description of drawings
The invention will be further described below in conjunction with design drawing:
Fig. 1 is a kind of circuit diagram based on the simulating signal buffer circuit that rotates electric capacity of the present invention;
Among Fig. 1: 1, output head anode; 2, negative pole of output end; 3, input anode; 4, input cathode.
Embodiment
Be a kind of simulating signal buffer circuit based on rotation electric capacity of the present invention as shown in Figure 1, comprise: dpdt relay K, capacitor C; Wherein the pin K1 of dpdt relay K links to each other with an end of capacitor C, and pin K4 links to each other with the other end of capacitor C, and pin K8 connects ground, pin K7 input sample square-wave signal; Pin K2 connects input anode 3, and pin K5 connects input cathode 4; Pin K3 connects output head anode 1, and pin K6 connects negative pole of output end 2.
Under the control of dpdt relay K, capacitor C is connected with input end Vi, output end vo takes turns conducting with the sampling square wave frequency, Vi gives the capacitor C charge or discharge when switch switches to input end Vi side, after an of short duration transient process, the voltage at electric capacity two ends should be identical with Vi, when switch switches to the output end vo side, if it is infinitely great that loaded impedance reaches, because the accumulation of energy function of capacitor C, Vo should with switch before Vi equate, thereby finished the isolation translation function of Vi.
During use, input end signal is connected input anode, input cathode, output head anode, negative pole connect back-end circuit, and at dpdt relay pin K7, K8 input sample square wave.
Above embodiment does not constitute any restriction to content of the present invention to of the present invention with reference to explanation, obviously under thought of the present invention, can make multi-form structure modify, but these are all at the row of protection of the present invention.
The parts that present embodiment is not described in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not narration one by one.
Claims (3)
1. the simulating signal buffer circuit based on rotation electric capacity is characterized in that comprising dpdt relay K, capacitor C; Wherein the pin K1 of dpdt relay K links to each other with an end of capacitor C, and pin K4 links to each other with the other end of capacitor C, and pin K8 connects ground, pin K7 input sample square-wave signal; Pin K2 connects input anode (3), and pin K5 connects input cathode (4); Pin K3 connects output head anode (1), and pin K6 connects negative pole of output end (2).
2. according to claim 1 a kind of based on the simulating signal buffer circuit that rotates electric capacity, the pin K7 input sample square-wave signal that it is characterized in that described dpdt relay K, control dpdt relay pin K1 and K2, K3 take turns conducting, and K4 and K5, K6 take turns conducting.
3. a kind of simulating signal buffer circuit based on rotation electric capacity according to claim 1 is characterized in that capacitor C is connected with input end Vi under the control of dpdt relay K, output end vo takes turns conducting with the square wave frequency of sampling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102553033A CN103336159A (en) | 2013-06-25 | 2013-06-25 | Analog signal isolating circuit based on rotary capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102553033A CN103336159A (en) | 2013-06-25 | 2013-06-25 | Analog signal isolating circuit based on rotary capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103336159A true CN103336159A (en) | 2013-10-02 |
Family
ID=49244362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102553033A Pending CN103336159A (en) | 2013-06-25 | 2013-06-25 | Analog signal isolating circuit based on rotary capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103336159A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110687336A (en) * | 2019-10-31 | 2020-01-14 | 中电科仪器仪表有限公司 | Broadband analog signal isolation circuit and method based on electric field coupling and oscilloscope |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1137135A (en) * | 1995-05-26 | 1996-12-04 | 曹玉山 | Full-buffer data acquisition equipment |
| CN101364800A (en) * | 2008-09-26 | 2009-02-11 | 海芯科技(厦门)有限公司 | Low noise switch capacitor circuit having embedded amplifier |
| CN101533058A (en) * | 2009-04-24 | 2009-09-16 | 东北大学 | Power abnormal failure data analyzing device and diagnosing method |
| CN101587753A (en) * | 2009-06-26 | 2009-11-25 | 北京中星微电子有限公司 | A kind of simulating signal sample circuit and a kind of switched-capacitor circuit |
| CN102693874A (en) * | 2011-03-24 | 2012-09-26 | 苏州磁明科技有限公司 | Double-pole-double-throw electromechanical relay |
-
2013
- 2013-06-25 CN CN2013102553033A patent/CN103336159A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1137135A (en) * | 1995-05-26 | 1996-12-04 | 曹玉山 | Full-buffer data acquisition equipment |
| CN101364800A (en) * | 2008-09-26 | 2009-02-11 | 海芯科技(厦门)有限公司 | Low noise switch capacitor circuit having embedded amplifier |
| CN101533058A (en) * | 2009-04-24 | 2009-09-16 | 东北大学 | Power abnormal failure data analyzing device and diagnosing method |
| CN101587753A (en) * | 2009-06-26 | 2009-11-25 | 北京中星微电子有限公司 | A kind of simulating signal sample circuit and a kind of switched-capacitor circuit |
| CN102693874A (en) * | 2011-03-24 | 2012-09-26 | 苏州磁明科技有限公司 | Double-pole-double-throw electromechanical relay |
Non-Patent Citations (1)
| Title |
|---|
| 张利华: "旋转电容滤波器特性分析", 《电子测量与仪器学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110687336A (en) * | 2019-10-31 | 2020-01-14 | 中电科仪器仪表有限公司 | Broadband analog signal isolation circuit and method based on electric field coupling and oscilloscope |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103248365B (en) | Front-end circuit of analog-digital converter | |
| CN105119604A (en) | Bootstrap switch circuit suitable for sampling of an analog-to-digital converter in a low power and voltage condition | |
| CN103346745A (en) | Input-stage fully differential operational amplifier of D-type audio power amplifier | |
| CN102195571B (en) | Switched capacitor amplifier | |
| CN203224544U (en) | Oscilloscope front-end processing module circuit | |
| CN103336159A (en) | Analog signal isolating circuit based on rotary capacitor | |
| CN109494978A (en) | Integrated circuit of power supply switching circuit and power supply switching controller | |
| CN103840772A (en) | Circuit for improving Doherty power amplifier linearity by using CRLH-TL compensating line | |
| CN204009646U (en) | A kind of regulated power supply continuous current controller | |
| CN203968060U (en) | A kind of sample circuit for photovoltaic combiner box | |
| CN205490438U (en) | Switch clipper -limiter | |
| CN203301445U (en) | Double-input and double-output module circuit of radio frequency switch | |
| CN105186860B (en) | Charge pump | |
| CN202841102U (en) | Current input ADC circuit | |
| CN203537330U (en) | Input-stage fully differential operational amplifier of D-type audio power amplifier | |
| CN101917184A (en) | Four-redundancy discrete signal integrated circuit | |
| CN103560772B (en) | A kind of low-resistance signal switching circuit | |
| CN203504501U (en) | Broadband low-noise amplifier | |
| CN203563016U (en) | Low-power-dissipation amplifier for mobile phones | |
| CN205545165U (en) | Direct current is to super broad band power amplifier of 40GHz | |
| CN203377381U (en) | High-gain array antenna | |
| CN202309624U (en) | Dual-ring feedback high-linearity variable gain amplifier | |
| CN103475321A (en) | Power amplifier | |
| CN209964026U (en) | Analog switch circuit of high isolation | |
| CN203563013U (en) | High-input-impedance amplifier for mobile phones |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20131002 |