CN109804563A - A kind of rectification circuit and rectifier - Google Patents

Abstract

A kind of rectification circuit and rectifier, are related to electronic technology field, can work normally when the voltage of the AC signal of input rectification circuit is less than Vth.Rectification circuit (E) includes biasing module (A), comparison module (B), amplification module (C) and rectifying transistor (D)；The output end of power end connection rectification circuit (E) of biasing module (A), the offset side of output end connection comparison module (B) of biasing module (A) and the offset side of amplification module (C), the input terminal of first input end connection rectification circuit (E) of comparison module (B), the output end of the second input terminal connection rectification circuit (E) of comparison module (B), the input terminal of output end connection amplification module (C) of comparison module (B), the output end of power end connection rectification circuit (E) of amplification module (C), the grid of output end connection rectifying transistor (D) of amplification module (C), the input terminal of source electrode connection rectification circuit (E) of rectifying transistor (D), the output end of drain electrode connection rectification circuit (E) of rectifying transistor (D).Biasing module (A) is comparison module (B) and amplification module (C) provides the bias voltage for being less than the threshold voltage of transistor；Comparison module (B) outputs a control signal to amplification module (C) after comparing the output voltage of the input voltage of the input terminal of rectification circuit (E) and the output end of rectification circuit (E)；Amplification module (C) is to the grid for being output to rectifying transistor (D) after control signal amplification, to control its on or off.

Description

A kind of rectification circuit and rectifier Technical field

The present invention relates to electronic technology field more particularly to a kind of rectification circuits and rectifier.

Background technique

In recent years, energy acquisition technology continues to develop, and usually during carrying out energy acquisition using energy acquisition technology needs that the AC signal for inputting it is converted to direct current signal by rectifier.

At present, usually using complementary metal oxide semiconductor (the Complementary Metal Oxide Semiconductor of diode connection, CMOS) the inactive rectification circuit in Guan Zucheng rectifier, since the pressure drop in the CMOS tube of diode connection is larger, about threshold voltage (the threshold voltage of CMOS tube, Vth), therefore, when input the inactive rectification circuit AC signal voltage value approach, be much smaller than or be equal to Vth when, which can not work normally.In order to solve this problem, propose a kind of rectification circuit as shown in Figure 1, in Fig. 1, when transistor M01 is switched on, transistor M01 works in linear zone, and the pressure drop of transistor M01 at this time is the voltage difference between the drain electrode and source electrode of transistor M01, and since the voltage difference between the drain electrode and source electrode of transistor M01 is usually tens millivolts (much smaller than Vth, the magnitude of Vth is usually to lie prostrate), therefore the pressure drop of transistor M01 is smaller, to which the rectification circuit is when the voltage value for the AC signal that rectification circuit inputs is greater than Vth or is equal to Vth, the rectifier still can work normally.

Since the comparator in Fig. 1 is using the structure of bulk driven, that is two input terminals of comparator are connected respectively to the substrate of transistor M05 and transistor M06, therefore the minimum operating voltage of comparator can be reduced to Vth by this connection type, but when the voltage of the AC signal of input rectification circuit is less than Vth, due to being unable to reach the minimum operating voltage of comparator, so comparator can not work normally, so that rectification circuit can not work normally.

Summary of the invention

The application provides a kind of rectification circuit and rectifier, and the rectification circuit and rectifier can be worked normally in the case where the voltage of the AC signal of input rectification circuit is less than Vth.

In order to achieve the above objectives, the application adopts the following technical scheme that

In a first aspect, providing a kind of rectification circuit, which includes: biasing module, comparison module, amplification module and rectifying transistor.Wherein, the output end of the power end connection rectification circuit of biasing module, the offset side of the output end connection comparison module of biasing module and the offset side of amplification module, the input terminal of the first input end connection rectification circuit of comparison module, the output end of the second input terminal connection rectification circuit of comparison module, the input terminal of the output end connection amplification module of comparison module, the output end of the power end connection rectification circuit of amplification module, the grid of the output end connection rectifying transistor of amplification module, the input terminal of the source electrode connection rectification circuit of rectifying transistor, the output end of the drain electrode connection rectification circuit of rectifying transistor.Above-mentioned biasing module is used to provide bias voltage for comparison module and amplification module, and bias voltage is less than the threshold voltage of transistor；Comparison module is used to compare the output voltage of the input voltage of the input terminal of rectification circuit and the output end of rectification circuit, and outputs a control signal to amplification module according to the result of the comparison；Amplification module is used to amplify the control signal, and amplified control signal is output to the grid of rectifying transistor, to control rectifying transistor on or off.

Rectification circuit provided by the present application can provide bias voltage by biasing module for comparison module and amplification module, comparison module is allowed to compare the output voltage of the input voltage of the input terminal of rectification circuit and the output end of rectification circuit under the biasing of bias voltage, and amplification module is output a control signal to according to the result of the comparison, then amplification module again amplifies the control signal of comparison module output, and amplified control signal is output to the grid of rectifying transistor, to control rectifying transistor on or off, it is rectified to control the AC signal of input terminal input of the rectification circuit to rectification circuit.In the rectification circuit, since biasing module is the threshold voltage that the bias voltage that comparison module and amplification module provide is less than transistor, can so it make in the case where the input voltage of the input terminal of rectification circuit is less than the threshold voltage of transistor, comparison module and amplification module in the rectification circuit also can work normally, to ensure that the rectification circuit can be in the input electricity of the input terminal of rectification circuit It is worked normally in the case where threshold voltage of the pressure less than transistor.

In rectification circuit provided by the present application, the output end of the substrate connection rectification circuit of rectifying transistor, therefore will form a substrate parasitics diode between the input terminal of rectification circuit and the output end of rectification circuit.When rectification circuit starts starting, the input voltage of the input terminal of rectification circuit is greater than the output voltage of the output end of rectification circuit, therefore the electric current in the rectification circuit can pass through the substrate parasitics diode from the input terminal of rectification circuit, the output end of rectification circuit is flowed to, so that rectification circuit smoothly starts.Compared with the rectification circuit that the prior art provides needs to start rectification circuit by a transistor when starting starting, rectification circuit provided by the present application simplifies the structure of rectification circuit, saves the area of rectification circuit.

In rectification circuit provided by the present application, due to the output end of the substrate connection rectification circuit of rectifying transistor, and the rectification circuit is lost smaller in the case where rectifying transistor is fully turned on, therefore the output voltage of the output end of the rectification circuit is larger (i.e. close to the maximum value of the input voltage of the input terminal of rectification circuit), so as to guarantee that the substrate of rectifying transistor is in high potential always.With controlled in the rectification circuit that the prior art provides by substrate adjuster the substrate of rectifying transistor always in high potential compared with, due to no longer needing to the circuit structure of design substrate adjuster part in rectification circuit provided by the present application, so as to be further simplified the structure of rectification circuit, the area of rectification circuit is saved.

In the first possible implementation of the first aspect, biasing module in rectification circuit provided by the present application includes: first resistor, the first transistor, second transistor, third transistor, the 4th transistor, the 5th transistor and the 6th transistor, one end of first resistor is the power end of biasing module, and the drain electrode of the 5th transistor is the output end of biasing module；Wherein, output end, the source electrode of the 4th transistor and the source electrode of the 5th transistor of one end connection rectification circuit of first resistor, the grid of the other end connection the first transistor of first resistor and the grid of second transistor；The grid of the drain electrode connection the first transistor of the first transistor, the drain electrode of the source electrode connection second transistor of the first transistor and the grid of third transistor；The source electrode of second transistor is grounded；The drain electrode of drain electrode the 4th transistor of connection of third transistor, the source electrode ground connection of third transistor；The grid of 4th transistor connects drain electrode and the grid of the 5th transistor of the 4th transistor；The drain electrode of drain electrode the 6th transistor of connection of 5th transistor and the grid of the 6th transistor, the source electrode ground connection of the 6th transistor.

In the application, since the biasing module in rectification circuit can provide the bias voltage of the threshold voltage less than transistor for comparison module and amplification module, can so it make in the case where the input voltage of the input terminal of rectification circuit is less than the threshold voltage of transistor, comparison module and amplification module in rectification circuit provided by the present application still can work normally, to ensure that rectification circuit provided by the present application can be worked normally in the case where the input voltage of the input terminal of rectification circuit is less than the threshold voltage of transistor.

In the second possible implementation of the first aspect, comparison module in rectification circuit provided by the present application includes: the 7th transistor, the 8th transistor, the 9th transistor and the tenth transistor, the grid of 9th transistor is the offset side of comparison module, the source electrode of 7th transistor is the first input end of comparison module, the source electrode of 8th transistor is the second input terminal of comparison module, and the drain electrode of the 8th transistor is the output end of comparison module；Wherein, the drain electrode of grid the 7th transistor of connection of the 7th transistor, the drain electrode of the grid and the 9th transistor of the 8th transistor, the input terminal of the source electrode connection rectification circuit of the 7th transistor；The drain electrode of drain electrode the tenth transistor of connection of 8th transistor, the output end of the source electrode connection rectification circuit of the 8th transistor；The grid of 9th transistor connects the grid of the tenth transistor, the source electrode of the 9th transistor and the source electrode ground connection of the tenth transistor.

In the application, since the comparison module in rectification circuit uses the form of source electrode input, that is the source electrode of the 7th transistor and the substrate input terminal that is all connected with rectification circuit, therefore, no matter how the amplitude of the input voltage of the input terminal of rectification circuit changes, and even if the input voltage of the input terminal of input rectification circuit is less than the output voltage of the output end of rectification circuit, the electric current of rectification circuit can not also flow to the input terminal of rectification circuit by the substrate parasitics diode of the 7th transistor from the output end of rectification circuit, i.e. the rectification circuit will not generate reverse current.Compared with form of the comparator using substrate input in the rectification circuit that the prior art provides (when using the form of substrate input, if the amplitude of the input voltage of the input terminal of input rectification circuit is bigger, and the input voltage of the input terminal of rectification circuit is less than the output voltage of the output end of rectification circuit, it would be possible that reverse current can be generated, so that rectification circuit can not work normally), due to rectification circuit provided by the present application, no matter how the amplitude of the input voltage of the input terminal of the rectification circuit changes, negater circuit will not all be generated, therefore it can expand the range of the input voltage of the input terminal of rectification circuit.

In a third possible implementation of the first aspect, amplification module in rectification circuit provided by the present application includes: the 11st transistor, the tenth two-transistor, the 13rd transistor, the 14th transistor, the grid of 13rd transistor is the offset side of amplification module, the grid of 11st transistor is the input terminal of amplification module, the source electrode of 11st transistor is the power end of amplification module, and the drain electrode of the tenth two-transistor is the output end of amplification module.Wherein, the output end of the grid connection comparison module of 11st transistor, the drain electrode of the grid and the 13rd transistor of drain electrode the tenth two-transistor of connection of 11st transistor, the output end of the source electrode connection rectification circuit of the 11st transistor and the source electrode of the tenth two-transistor；The drain electrode of drain electrode the 14th transistor of connection of tenth two-transistor；The output end of the grid connection biasing module of 13rd transistor and the grid of the 14th transistor, the source electrode of the 13rd transistor and the source electrode ground connection of the 14th transistor.

In the application, under the biasing for the bias voltage that biasing module provides, the electric current of each branch in amplification module can maintain always in a smaller range amplification module in rectification circuit.The level Four reverse driven in device is compared to (when the control signal of the comparison module output in the comparator of the prior art switches compared with the prior art, i.e. the control signal is switched to low level by high level, or when by low level being switched to high level, the electric current of each branch in level Four reverse driven can increase moment, to which the power consumption of level Four reverse driven also will increase), since the electric current of each branch in amplification module provided by the present application maintains always in a smaller range, therefore the power consumption of the amplification module is smaller, so as to reduce the power consumption of rectification circuit.

In a fourth possible implementation of the first aspect, rectification circuit provided by the present application further includes starting module.Wherein, the input terminal of the power end connection rectification circuit of starting module, the output end of the input terminal connection rectification circuit of starting module, the offset side of the output end connection comparison module of starting module and the offset side of amplification module.Above-mentioned starting module is used in the case where the output end of rectification circuit does not have output voltage, provides bias voltage for comparison module and amplification module.

In the application, the output end of the power end connection rectification circuit of biasing module in rectification circuit, i.e. the output end of rectification circuit provides supply voltage for biasing module, i.e., in the case where the output end of rectification circuit is without normally exporting, biasing module may can not work normally So biasing module just can not provide bias voltage for comparison module and amplification module, at this time in order to guarantee that rectification circuit can normally start, it can be that comparison module and amplification module temporarily provide bias voltage by starting module, so that rectification circuit can normally start, to ensure that the normal work of rectification circuit.

In the fifth possible implementation of the first aspect, starting module in rectification circuit provided by the present application includes the 15th transistor, the grid of 15th transistor is the input terminal of starting module, the source electrode of 15th transistor is the power end of starting module, and the drain electrode of the 15th transistor is the output end of starting module.Wherein, the output end of the grid connection rectification circuit of the 15th transistor, the offset side of the drain electrode connection comparison module of the 15th transistor and the offset side of amplification module, the input terminal of the source electrode connection rectification circuit of the 15th transistor.

In the application, the output end of the power end connection rectification circuit of biasing module in rectification circuit, that is the output end of rectification circuit provides supply voltage for biasing module, i.e. in the case where the output end of rectification circuit is without normally exporting, biasing module may can not work normally, so biasing module just can not provide bias voltage for comparison module and amplification module, at this time in order to guarantee that rectification circuit can normally start, it can control the 15th transistor turns in starting module, to which the input voltage of the input terminal of rectification circuit can be output to the offset side of comparison module and the offset side of amplification module by the 15th transistor, temporarily to provide bias voltage for comparison module and amplification module, so that rectification circuit can normally start, and then it ensure that the normal work of rectification circuit.

In the sixth possible implementation of the first aspect, rectification circuit provided by the present application further includes electric capacity of voltage regulation, the output end of one end connection biasing module of electric capacity of voltage regulation and the output end of starting module, the other end ground connection of electric capacity of voltage regulation.

In the application, electric capacity of voltage regulation in rectification circuit can store the voltage of the output end (or output end of biasing module) of starting module, to stablize the voltage of the output end of starting module when starting module provides bias voltage as comparison module and amplification module.

Second aspect, the application provides a kind of rectifier, the rectifier includes the first rectification circuit and filter capacitor, first rectification circuit is the rectification circuit as described in any one in above-mentioned first aspect and its various possible implementations, one end of filter capacitor connects the output end of the first rectification circuit, the other end ground connection of filter capacitor.

In the first possible implementation of the second aspect, rectifier provided by the present application further includes the second rectification circuit and input control module, and the second rectification circuit is the rectification circuit as described in any one in above-mentioned first aspect and its various possible implementations.Wherein, the input terminal of the input terminal of the first rectification circuit and the second rectification circuit connects input control module, and the output end of the first rectification circuit connects the output end of the second rectification circuit.Above-mentioned input control module is used to input the input terminal of the first rectification circuit in first time period control differential input signal, so that the first rectification circuit works, and the input terminal that the differential input signal inputs the second rectification circuit is controlled in first time period, so that the second rectification circuit works.

In a second possible implementation of the second aspect, above-mentioned input control module includes: the 16th transistor and the 17th transistor.Wherein, the grid of the 16th transistor connects the input terminal of the first rectification circuit, the input terminal of drain electrode the second rectification circuit of connection of the 16th transistor, the source electrode ground connection of the 16th transistor；The grid of 17th transistor connects the input terminal of the second rectification circuit, the input terminal of drain electrode the first rectification circuit of connection of the 17th transistor, the source electrode ground connection of the 17th transistor.

The description of the beneficial effect of second aspect and its various possible implementations specifically may refer to above-mentioned to first aspect and its associated description of the beneficial effect of various possible implementations, details are not described herein again.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, the drawings to be used in the description of the embodiments or prior art will be briefly described below, it should be evident that drawings in the following description are only some embodiments of the invention.

Fig. 1 is a kind of schematic diagram for rectification circuit that the prior art provides；

Fig. 2 is a kind of schematic diagram one of rectification circuit provided in an embodiment of the present invention；

Fig. 3 is a kind of schematic diagram two of rectification circuit provided in an embodiment of the present invention；

Fig. 4 is a kind of schematic diagram three of rectification circuit provided in an embodiment of the present invention；

Fig. 5 is a kind of schematic diagram four of rectification circuit provided in an embodiment of the present invention；

Fig. 6 is a kind of schematic diagram five of rectification circuit provided in an embodiment of the present invention；

Fig. 7 is a kind of schematic diagram six of rectification circuit provided in an embodiment of the present invention；

Fig. 8 is a kind of schematic diagram seven of rectification circuit provided in an embodiment of the present invention；

Fig. 9 is a kind of schematic diagram one of rectifier provided in an embodiment of the present invention；

Figure 10 is a kind of schematic diagram two of rectifier provided in an embodiment of the present invention；

Figure 11 is a kind of schematic diagram three of rectifier provided in an embodiment of the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention is described in detail, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.

Term " first ", " second " and " third " in the embodiment of the present invention etc. are not use to describe a particular order for distinguishing different objects.For example, the first transistor, second transistor and third transistor etc. are the particular orders for distinguishing different crystal pipe, rather than for describing different crystal pipe.

In embodiments of the present invention, " illustrative " or " such as " etc. words for indicate make example, illustration or explanation.Be described as in the embodiment of the present invention " illustrative " or " such as " any embodiment or design scheme be not necessarily to be construed as than other embodiments or design scheme more preferably or more advantage.Specifically, use " illustrative " or " such as " etc. words be intended to that related notion is presented in specific ways.

Rectifier is the device that AC signal can be converted to direct current signal.Usually, rectifier is made of rectification circuit and filter etc., rectifier can be applied in energy acquisition technology, such as, during using energy acquisition technology acquisition vibration energy, after converting AC signal for vibration energy, need to rectify AC signal by rectifier, and supply load by being converted into direct current signal after filter filtering and use, to realize the acquisition and utilization of vibration energy.Usually, in the case where vibration energy is weaker, after converting AC signal for vibration energy, the voltage of the AC signal is smaller, therefore need rectifier that can still can work normally in the lesser situation of voltage of the AC signal of input rectifier, in the prior art, comparator shown in FIG. 1 using bulk driven structure, that is two input terminals of comparator are connected respectively to the substrate of transistor M05 and transistor M06, and the minimum operating voltage of comparator can be reduced to Vth by this connection type, therefore when the voltage of the AC signal of input rectification circuit is less than Vth, due to being unable to reach the minimum operating voltage of comparator, so comparator can not work normally, to which rectification circuit can not be normal Work namely rectifier in the prior art can not work normally when the voltage of the AC signal of input rectifier is less than Vth.

To solve the above-mentioned problems, the embodiment of the present invention provides a kind of rectification circuit and rectifier, and the rectification circuit and rectifier can be worked normally in the case where the voltage of the AC signal of input rectification circuit is less than Vth.Rectification circuit provided in an embodiment of the present invention and rectifier are described in detail below.

As shown in Fig. 2, the embodiment of the present invention provides a kind of rectification circuit, comprising: biasing module 11, comparison module 12, amplification module 13 and rectifying transistor 14.

Wherein, the power end 111 of biasing module 11 connects the output end (Output is expressed as in Fig. 2) of rectification circuit, the output end 112 of biasing module 11 connects the offset side 121 of comparison module 12 and the offset side 131 of amplification module 13, the first input end 122 of comparison module 12 connects the input terminal (Input is expressed as in Fig. 2) of rectification circuit, the output end of the second input terminal 123 connection rectification circuit of comparison module 12, the output end 124 of comparison module 12 connects the input terminal 132 of amplification module 13, the power end 133 of amplification module 13 connects the output end of rectification circuit, the output end 134 of amplification module 13 connects the grid of rectifying transistor 14, the input terminal of the source electrode connection rectification circuit of rectifying transistor 14, rectifying transistor 24 Drain electrode connection rectification circuit output end.

Above-mentioned biasing module 11, for providing bias voltage for comparison module 12 and amplification module 13, which is less than the threshold voltage of transistor；Comparison module 12 for comparing the output voltage of the input voltage of the input terminal of rectification circuit and the output end of rectification circuit, and outputs a control signal to amplification module 13 according to the result of the comparison；Amplification module 13, for being amplified to control signal, and by the amplified grid for controlling signal and being output to rectifying transistor 14, to control 14 on or off of rectifying transistor.

It should be noted that the threshold voltage of above-mentioned transistor is usually determined by the fabrication process condition of transistor.Illustratively, when the fabrication process condition of the transistor used in rectification circuit provided in an embodiment of the present invention and rectifier is the 0.18um CMOS technology of standard, the threshold voltage of these transistors is usually about 500mV.

Rectification circuit provided in an embodiment of the present invention provides bias voltage by biasing module for comparison module and amplification module, comparison module is compared under the biasing of bias voltage The output voltage of the output end of the input voltage and rectification circuit of the input terminal of rectification circuit, and amplification module is output a control signal to according to the result of the comparison, then amplification module again amplifies the control signal of comparison module output, and amplified control signal is output to the grid of rectifying transistor, to control rectifying transistor on or off, so that the AC signal for controlling input terminal input of the rectification circuit to rectification circuit rectifies.In the rectification circuit, since biasing module is the threshold voltage that the bias voltage that comparison module and amplification module provide is less than transistor, can so it make in the case where the input voltage of the input terminal of rectification circuit is less than the threshold voltage of transistor, comparison module and amplification module in the rectification circuit also can work normally, to ensure that the rectification circuit can be worked normally in the case where the input voltage of the input terminal of rectification circuit is less than the threshold voltage of transistor.

Optionally, the rectifying transistor 14 in the embodiment of the present invention can be metal-oxide semiconductor (MOS) (metal oxide semiconductor, MOS) transistor of P-channel.

Optionally, in the embodiment of the present invention, when the input voltage of the input terminal of rectification circuit is greater than the output voltage of the output end of rectification circuit, the control signal of above-mentioned comparison module output is low level signal.When the input voltage of the input terminal of rectification circuit is less than the output voltage of the output end of rectification circuit, the control signal of above-mentioned comparison module output is high level signal.

Optionally, in the embodiment of the present invention, since the amplitude variation of the control signal of comparison module output is smaller, therefore after the output end output control signal of comparison module, in order to guarantee the control signal to the control action of rectifying transistor (if the amplitude variation of control signal is too small, may result in the control signal can not be accurate, rapidly control rectifying transistor is fully on or ends), the control signal can be amplified by amplification module, to so that the amplitude variation of the control signal is bigger (if the amplitude variation of control signal is bigger, the control signal can be allowed accurate, rapidly control rectifying transistor is fully on or ends).

In rectification circuit provided in an embodiment of the present invention, when rectifying transistor is fully turned on, the rectifying transistor works in linear zone, and the pressure drop of the rectifying transistor at this time is the voltage difference between the drain electrode and source electrode of the rectifying transistor, and since the voltage difference between the drain electrode and source electrode of the rectifying transistor is usually tens millivolts, therefore the pressure drop of the rectifying transistor is smaller, so that the loss of the rectification circuit is smaller, voltage conversion efficiency is higher.

As shown in Fig. 2, the substrate 141 of rectifying transistor 14 connects the output end of rectification circuit in rectification circuit provided in an embodiment of the present invention, therefore it will form a substrate parasitics diode 142 between the input terminal of rectification circuit and the output end of rectification circuit.When rectification circuit starts starting, the input voltage of the input terminal of rectification circuit is greater than the output voltage of the output end of rectification circuit, therefore the electric current in the rectification circuit can flow to the output end of rectification circuit from the input terminal of rectification circuit by substrate parasitics diode 142, so that rectification circuit smoothly starts.Compared with the rectification circuit that the prior art as shown in Figure 1 provides needs to start rectification circuit by transistor M02 when starting starting, the structure of rectification circuit is simplified, the area of rectification circuit is saved.

Further, as shown in Figure 2, rectification circuit provided in an embodiment of the present invention, since the substrate 141 of rectifying transistor 14 connects the output end of rectification circuit, and rectification circuit provided in an embodiment of the present invention is lost smaller in the case where rectifying transistor 14 is fully turned on, therefore the output voltage of the output end of rectification circuit provided in an embodiment of the present invention is larger (i.e. close to the maximum value of the input voltage of the input terminal of rectification circuit), so as to guarantee the substrate 141 of rectifying transistor 14 always in high potential, with controlled in the rectification circuit that the prior art as shown in Figure 1 provides by substrate adjuster the substrate of transistor M01 always in high potential compared with, due to no longer needing to the circuit structure of design substrate adjuster part in rectification circuit provided in an embodiment of the present invention, so as to be further simplified The structure of rectification circuit saves the area of rectification circuit.

The output end of the power end connection rectification circuit of biasing module in rectification circuit provided in an embodiment of the present invention, when rectification circuit starts starting, the voltage difference of the output voltage of the output end of the input voltage and rectification circuit of the input terminal of rectification circuit can be by the substrate parasitics diode current flow of rectifying transistor, so that AC signal to be rectified can flow to the output end of rectification circuit from the input terminal of rectification circuit by the substrate parasitics diode, after AC signal to be rectified flows to the output end of rectification circuit, the output end of rectification circuit can provide supply voltage for biasing module, biasing module is set to start to work, and bias voltage is provided for comparison module and amplification module by biasing module, comparison module is allowed to compare the output voltage of the input voltage of the input terminal of rectification circuit and the output end of rectification circuit, and according to Comparison result outputs a control signal to amplification module, and then amplification module can export comparison module Control signal amplify, and amplified control signal is output to the grid of rectifying transistor, to control rectifying transistor on or off, so that the AC signal for controlling input terminal input of the rectification circuit to rectification circuit rectifies.

It should be noted that, in the embodiment of the present invention, the first input end of comparison module it can be appreciated that comparison module the first power end, second input terminal of comparison module it can be appreciated that comparison module second source end, i.e. in the embodiment of the present invention, supply voltage can be provided for comparison module by the input terminal of rectification circuit and the output end of rectification circuit.

Optionally, in conjunction with Fig. 2, as shown in Figure 3, above-mentioned biasing module 11 in rectification circuit provided in an embodiment of the present invention includes first resistor R1, the first transistor M1, second transistor M2, third transistor M3, the 4th transistor M4, the 5th transistor M5 and the 6th transistor M6, one end of first resistor R1 is the power end 111 of biasing module 11, and the drain electrode of the 5th transistor M5 is the output end 112 of biasing module 11.

Wherein, output end, the source electrode of the 4th transistor M4 and the source electrode of the 5th transistor M5 of one end connection rectification circuit of first resistor R1, the grid of the other end connection the first transistor M1 of first resistor R1 and the grid of second transistor M2；The grid of the drain electrode connection the first transistor M1 of the first transistor M1, the drain electrode of the source electrode connection second transistor M2 of the first transistor M1 and the grid of third transistor M3；The source electrode of second transistor M2 is grounded (GND is expressed as in Fig. 3)；The drain electrode of the 4th transistor M4 of drain electrode connection of third transistor M3, the source electrode ground connection of third transistor M3；The grid of 4th transistor M4 connects drain electrode and the grid of the 5th transistor M5 of the 4th transistor M4；The drain electrode of the 6th transistor M6 of drain electrode connection of 5th transistor M5 and the grid of the 6th transistor M6, the source electrode ground connection of the 6th transistor M6.

Optionally, the first transistor M1 shown in Fig. 3 provided in an embodiment of the present invention, second transistor M2, third transistor M3 and the 6th transistor M6 can be the MOS transistor of N-channel, and the 4th transistor M4 and the 5th transistor M5 in Fig. 3 can be the MOS transistor of P-channel.

As shown in figure 3, the first resistor R1 in the output end connection biasing module 11 of rectification circuit provided in an embodiment of the present invention, the resistance value of first resistor R1 is larger, and first resistor R1, and the first transistor M1 and second transistor M2 are adopted and be connected serially, therefore After the output voltage of the output end of rectification circuit is divided by first resistor R1, it can be by the threshold voltage (threshold voltage close to transistor can be biased in practical applications) of the voltage bias of the grid (i.e. a point in Fig. 3) of the first transistor M1 to transistor, the threshold voltage is divided by the first transistor M1 again, so that the voltage of the source electrode (i.e. b point in Fig. 3) of the first transistor M1 is less than the threshold voltage, then third transistor M3, 4th transistor M4, the mirror image circuit that 5th transistor M5 and the 6th transistor M6 is constituted amplifies the voltage of b point, and the voltage of amplified b point is output to the offset side 121 of comparison module 12 and the offset side 131 of amplification module 13 from the drain electrode (i.e. c point in Fig. 3) of the 5th transistor M5, and due to the voltage of c point Less than the threshold voltage of the transistor, therefore the bias voltage of the comparison module in rectification circuit provided in an embodiment of the present invention and amplification module is respectively less than the threshold voltage of transistor, can so it make in the case where the input voltage of the input terminal of rectification circuit is less than the threshold voltage of transistor, comparison module and amplification module in rectification circuit provided in an embodiment of the present invention still can work normally, to ensure that rectification circuit provided in an embodiment of the present invention can be worked normally in the case where the input voltage of the input terminal of rectification circuit is less than the threshold voltage of transistor.

In the embodiment of the present invention, the setting of the resistance value of above-mentioned first resistor R1 is subject to can be by the threshold voltage of the voltage bias of the point of a shown in Fig. 3 to transistor.Specifically, the resistance value of above-mentioned first resistor R1 can be configured according to actual needs, the present invention is with no restrictions.

In the embodiment of the present invention, as shown in Figure 3, due to the series connection of the first transistor M1 and second transistor M2, so that the drain-to-gate voltage of the M2 of second transistor is greater than the drain-to-gate voltage of the first transistor M1, in order to keep the current balance type of the first transistor M1 and the place second transistor M2 branch (i.e. the branch that drain electrode-M1 source electrode-M2 drain electrode-M2 source electrode of M1 is formed), b point voltage is generally much less than the threshold voltage of transistor, so if being directly input to the offset side of comparison module and amplification module using the voltage of b point as bias voltage, then because bias voltage is too small comparison module and amplification module can be can not work normally, so in order to guarantee that comparison module and amplification module work normally, it is input to comparison module and amplification module again after can amplifying to the voltage of b point.Wherein, due in rectification circuit provided in an embodiment of the present invention, need to guarantee biasing module provide bias voltage be less than transistor threshold voltage, therefore the above-mentioned voltage to b point amplify after voltage value It should be less than the threshold voltage of transistor.

Optionally, in conjunction with Fig. 3, as shown in Figure 4, comparison module 12 in rectification circuit provided in an embodiment of the present invention includes: the 7th transistor M7, the 8th transistor M8, the 9th transistor M9 and the tenth transistor M10, the grid of 9th transistor M9 is the offset side 121 of comparison module 12, the source electrode of 7th transistor M7 is the first input end 122 of comparison module 12, the source electrode of 8th transistor M8 is the second input terminal 133 of comparison module 12, and the drain electrode of the 8th transistor M8 is the output end 134 of comparison module 12.

Wherein, the drain electrode of the 7th transistor M7 of grid connection of the 7th transistor M7, the drain electrode of the grid and the 9th transistor M9 of the 8th transistor M8, the input terminal Input of the source electrode connection rectification circuit of the 7th transistor M7；The drain electrode of the tenth transistor M10 of drain electrode connection of 8th transistor M8, the output end Output of the source electrode connection rectification circuit of the 8th transistor M8；The grid of 9th transistor M9 connects the grid of the tenth transistor M10, the source electrode of the 9th transistor M9 and the source electrode ground connection of the tenth transistor M10.

Optionally, the 7th transistor M7 and the 8th transistor M8 shown in Fig. 4 provided in an embodiment of the present invention can be the MOS transistor of P-channel, and the 9th transistor M9 and the tenth transistor M10 in Fig. 4 can be the MOS transistor of N-channel.

Since the rectification circuit that the prior art as shown in Figure 1 provides uses the form of substrate input, that is the input terminal of the substrate connection rectification circuit of M05 in Fig. 1, the output end of the source electrode connection rectification circuit of M05, it is less than the output voltage of the output end of rectification circuit in the input voltage of the input terminal of rectification circuit, and the voltage difference of the input voltage of the input terminal of the output voltage and rectification circuit of the output end of rectification circuit can be by the substrate parasitics diode (source electrode of the anode connection M05 of the substrate parasitics diode of M05 of M05, the substrate parasitics diode of M05 cathode connection M05 substrate) conducting in the case where, electric current in rectification circuit can flow to the input terminal of rectification circuit by the substrate parasitics diode of M05 from the output end of rectification circuit, generate reverse current, so that rectification circuit can not It works normally.And in rectification circuit shown in Fig. 4 provided in an embodiment of the present invention, due to using the form of source electrode input in comparison module 12, that is the source electrode of M7 and the substrate input terminal that is all connected with rectification circuit, even if the case where output voltage for the output end that the input voltage for the input terminal of rectification circuit therefore occur is less than rectification circuit, the electric current of rectification circuit can not also pass through the substrate parasitics two of M7 The input terminal that pole pipe (source electrode of the anode connection M7 of the substrate parasitics diode of M7, the substrate of the cathode connection M7 of the substrate parasitics diode of M7) flows to rectification circuit from the output end of rectification circuit, i.e., will not generate reverse current.Therefore, the rectification circuit as shown in Figure 1 that rectification circuit as shown in Figure 4 provided in an embodiment of the present invention provides compared with the prior art, it can still work normally when the input voltage of the input terminal of rectification circuit is larger, expand the range of the input voltage of the input terminal of rectification circuit.

Illustratively, in the case where the fabrication process condition of transistor is the 0.18um CMOS technology condition of standard, in rectification circuit shown in Fig. 1, usually when the input voltage of the input terminal of rectification circuit is greater than 700mV, voltage of the voltage of the input terminal of rectification circuit likely to be less than the output end of rectification circuit, the output voltage reverse irrigation of the output end of rectification circuit be may result in the input terminal of rectification circuit, therefore it may can not work normally when the output voltage of the output end of rectification circuit in the prior art as shown in Figure 1 in rectification circuit is greater than 700mV, so the maximum working voltage of rectification circuit as shown in Figure 1 is usually 700mV.And the operating voltage of rectification circuit provided in an embodiment of the present invention is not limited then by the input voltage of rectification circuit input end, maximum input voltage 1.8V equally in the case where the fabrication process condition of transistor is the 0.18um CMOS technology condition of standard, under the maximum working voltage of rectification circuit provided in an embodiment of the present invention typically process conditions.In this way, rectification circuit provided in an embodiment of the present invention expands the range of the input voltage of the input terminal of rectification circuit.

In the embodiment of the present invention, due in the comparison module 12 of rectification circuit as shown in Figure 4, when the input voltage (i.e. Vin) of the input terminal of rectification circuit is equal to the output voltage (Vout) of the output end of rectification circuit, i.e. as Vin=Vout, at this time the voltage of d point can be used as medium voltage (such as, in practical application, when the voltage of d point is greater than the medium voltage, it is considered that the voltage of d point is high level, when the voltage of d point is less than the medium voltage, it is believed that the voltage of d point is low level).

In the embodiment of the present invention, when Vin is greater than Vout, the voltage of the drain electrode of 7th transistor M7 increases, the voltage of the drain electrode of 7th transistor M7 also increases, due to the grid of the 8th transistor M8 of drain electrode connection of the 7th transistor M7, therefore the grid voltage of the 8th transistor M8 increases, and puts since the 8th transistor M8 and the tenth transistor M10 constitutes common source Big circuit, therefore the voltage (i.e. the voltage of d point) of the drain electrode of the 8th transistor M8 reduces, i.e., when Vin is greater than Vout, comparison module 12 exports low level.Wherein, when Vin is greater than Vout, the voltage (i.e. the voltage of d point) of the drain electrode of above-mentioned 8th transistor M8 is increased with the reduction of Vin, i.e., when Vin is gradually decreased and reaches minimum value, the voltage of d point is increased to maximum value.

When Vin is less than Vout, the voltage of the drain electrode of 7th transistor M7 reduces, the voltage of the drain electrode of 7th transistor M7 also reduces, due to the grid of the 8th transistor M8 of drain electrode connection of the 7th transistor M7, therefore the grid voltage of the 8th transistor M8 reduces, and since the 8th transistor M8 and the tenth transistor M10 constitutes common source amplification circuit structure, the voltage (i.e. the voltage of d point) of the drain electrode of the 8th transistor M8 is increased, i.e. when Vin is less than Vout, comparison module 12 exports high level.Wherein, when Vin is less than Vout, the voltage (i.e. the voltage of d point) of the drain electrode of above-mentioned 8th transistor M8 is reduced with the raising of Vin, and when Vin gradually rises and reaches maximum value, the voltage drop of d point is as low as minimum value.

Optionally, in conjunction with Fig. 4, as shown in Figure 5, above-mentioned amplification module 13 in rectification circuit provided in an embodiment of the present invention includes: the 11st transistor M11, the tenth two-transistor M12, the 13rd transistor M13 and the 14th transistor M14, the grid of 13rd transistor M11 is the offset side 131 of amplification module 13, the grid of 11st transistor M11 is the input terminal 132 of amplification module 13, the source electrode of 11st transistor M11 is the power end 133 of amplification module 13, and the drain electrode of the tenth two-transistor M12 is the output end 134 of amplification module 13.

Wherein, the output end 124 of the grid connection comparison module 12 of 11st transistor M11, the drain electrode of the grid and the 13rd transistor M13 of the tenth two-transistor M12 of drain electrode connection of 11st transistor M11, the source electrode of the output end Output and the tenth two-transistor M12 of the source electrode connection rectification circuit of the 11st transistor M11；The drain electrode of the 14th transistor M14 of drain electrode connection of tenth two-transistor M12；The output end 112 of the grid connection biasing module 11 of 13rd transistor M13 and the grid of the 14th transistor M14, the source electrode of the 13rd transistor M13 and the source electrode ground connection of the 14th transistor M14.

Optionally, the 11st transistor M11 and the tenth two-transistor M12 shown in Fig. 5 provided in an embodiment of the present invention can be the MOS transistor of P-channel, the in Fig. 5 the tenth Three transistor M13 and the 14th transistor M14 can be the MOS transistor of N-channel.

In rectification circuit as shown in Figure 5 provided in an embodiment of the present invention, the branch (i.e. the branch that the source electrode of the 13rd transistor M13 of drain electrode-of the 13rd transistor M13 of drain electrode-of the 11st transistor M11 of source electrode-of the 11st transistor M11 is formed) of the 13rd transistor M13 and the 14th transistor M14 under the biasing of the bias voltage of amplification module respectively where the 11st transistor M11 and the 13rd transistor M13 in amplification module 13 and the branch (i.e. the branch that the source electrode of the 14th transistor M14 of drain electrode-of the 14th transistor M14 of drain electrode-of the tenth two-transistor M12 of source electrode-of the tenth two-transistor M12 is formed) where the tenth two-transistor M12 and the 14th transistor M14 provide stable electric current, and (are less than transistor since the bias voltage is smaller Threshold voltage), therefore under the biasing of the bias voltage, flow through the branch where the 11st transistor M11 and the 13rd transistor M13, and the electric current of the tenth branch where two-transistor M12 and the 14th transistor M14 maintains always in a smaller range, and the control signal V03 of the comparison module output using the level Four reverse driven in comparator shown in FIG. 1 in a comparator switches in the prior art that (i.e. the control signal V03 is switched to low level by high level, or control signal V03 is switched to high level by low level) when, the electric current of each branch (each branch in level Four reverse driven is not showed that in Fig. 1) in level Four reverse driven shown in FIG. 1 can increase moment, the power consumption of level Four reverse driven also can be with the increasing of the electric current of each branch The big and amplification module 13 that increases, therefore provided in the embodiment of the present invention compared with the prior art in level Four reverse driven power consumption it is smaller, reduce the power consumption of rectification circuit.

Rectification circuit as shown in Figure 5 provided in an embodiment of the present invention, the 11st transistor M11, the tenth two-transistor M12, the 13rd transistor M13 and the 14th transistor M14 in amplification module 13 form two-stage amplifying circuit.Wherein, the 11st transistor M11 and the 13rd transistor M13 forms first order amplifying circuit；Tenth two-transistor M12 and the 13rd transistor M14 forms second level amplifying circuit, the control signal that two-stage amplifying circuit is used to export comparison module 12 amplifies, and amplified control signal is exported to rectifying transistor 14, to control the on or off of rectifying transistor 14.

Specifically, when the control signal that comparison module 12 exports is low level, the first order amplifying circuit of amplification module 13 carries out the low level control signal in the embodiment of the present invention After reversed amplification, the control signal of high level is exported, then carry out after reversely amplifying to the control signal of the high level by the second level amplifying circuit of amplification module 13, final amplification module 13 exports low level control signal.When the control signal that comparison module 12 exports is high level, the first order amplifying circuit of amplification module 13 carries out after reversely amplifying the control signal of the high level, export low level control signal, the low level control signal is carried out after reversely amplifying by the second level amplifying circuit of amplification module 13 again, final amplification module 13 exports the control signal of high level.

Optionally, the amplification module in rectification circuit provided in an embodiment of the present invention can also be the even levels amplifying circuits such as four-stage amplifier circuit, six grades of amplifying circuits, can specifically be configured according to actual needs, the present invention is with no restrictions.

It should be noted that, since every level-one amplifying circuit in the embodiment of the present invention in amplification module reversely amplifies, so the amplifying circuit of even level is generally included in amplification module, second amplifying circuit, four-stage amplifier circuit or six grades of amplifying circuits as escribed above etc..

Optionally, in conjunction with Fig. 5, as shown in Figure 6, it can also include starting module 15 in rectification circuit provided in an embodiment of the present invention, the power end 151 of starting module 15 connects the input terminal Input of rectification circuit, the input terminal 152 of starting module 15 connects the output end Output of rectification circuit, and the output end 153 of starting module 15 connects the offset side 121 of comparison module 12 and the offset side 131 of amplification module 13.

Starting module 15, for providing bias voltage for comparison module 12 and amplification module 13 in the case where the output end Output of rectification circuit does not have output voltage.

Rectification circuit as shown in FIG. 6 provided in an embodiment of the present invention, the output end of the power end connection rectification circuit of biasing module 11, that is the output end of rectification circuit provides bias voltage for biasing module, when rectification circuit starts starting, i.e. in the case where the output end of rectification circuit is without normally exporting, biasing module may can not work normally, so biasing module just can not provide bias voltage for comparison module and amplification module, at this time in order to guarantee that rectification circuit can normally start, can control starting module 15 is that comparison module 12 and amplification module 13 temporarily provide bias voltage.After rectification circuit starting, i.e. in the case where the output end of rectification circuit normally exports, Vout can control starting module 15 and stop working (method that specific control starting module 15 stops working will be described in detail in the following embodiments), from It and is that comparison module 12 and amplification module 13 provide bias voltage by biasing module 11.Such rectification circuit provided in an embodiment of the present invention can be that comparison module 12 and amplification module 13 temporarily provide bias voltage by starting module in the case where rectification circuit starts to start i.e. Vout equal to 0；It and after rectification circuit starting, i.e., is that comparison module 12 and amplification module 13 provide bias voltage by biasing module 11, to ensure that the normal work of rectification circuit in the case where the output end of rectification circuit normally exports.

Optionally, in conjunction with Fig. 6, as shown in Figure 7, above-mentioned starting module 15 in rectification circuit provided in an embodiment of the present invention may include the 15th transistor M15, the source electrode of 15th transistor M15 is the power end 151 of starting module 15, and the drain electrode of the 15th transistor M15 is the output end 152 of starting module 15.

Wherein, the output end Output of the grid connection rectification circuit of 15th transistor M15, the offset side 121 of the drain electrode connection comparison module 12 of 15th transistor M15 and the offset side 131 of amplification module 13, the input terminal Input of the source electrode connection rectification circuit of the 15th transistor M15.

Optionally, the 15th transistor M15 shown in Fig. 6 provided in an embodiment of the present invention can be the MOS transistor of P-channel.

Rectification circuit as shown in Figure 7 provided in an embodiment of the present invention, specifically controlling the method that starting module 15 stops working can be, when rectification circuit starts starting, i.e. in the case where the output end of rectification circuit is without normally exporting, the grid of 15th transistor M15 is low level, 15th transistor M15 conducting, to which the voltage Vin of the input terminal of rectification circuit can be output to the offset side 121 of comparison module 12 and the offset side 131 of amplification module 13 by the 15th transistor M15, i.e. starting module 15 is that comparison module 12 and amplification module 13 temporarily provide bias voltage, after circuit start, i.e. in the case where the normal output of the output end of rectification circuit, the grid of 15th transistor M15 is high level, 15th transistor M15 cut-off, that is starting module 1 5 stop working, and are that comparison module 12 and amplification module 13 provide bias voltage by biasing module 11.

Optionally, in conjunction with Fig. 7, as shown in figure 8, rectification circuit provided in an embodiment of the present invention can also include electric capacity of voltage regulation C1, the output end 112 of one end connection biasing module 11 of electric capacity of voltage regulation C1 and the output end 152 of starting module 15, another termination of electric capacity of voltage regulation C1 Ground.

It should be noted that, in the embodiment of the present invention, electric capacity of voltage regulation C1 in rectification circuit shown in fig. 8 can be used for storing the voltage of c point, to stablize the voltage of the output end 152 of starting module 15 when starting module 15 provides bias voltage for comparison module and amplification module.

As shown in Figure 9, the embodiment of the present invention provides a kind of rectifier, which includes the first rectification circuit D1 and filter capacitor C2, and the first rectification circuit can be the rectification circuit in above-mentioned Fig. 8, one end of filter capacitor C2 connects the output end of the first rectification circuit, the other end ground connection of filter capacitor C2.

Optionally, as shown in Figure 9, in the case where the input voltage of the input terminal (being expressed as Input1 in Fig. 9) of the first rectification circuit D1 is greater than the output voltage of the output end (being identified as Output1 in Fig. 9) of the first rectification circuit, the grid of rectifying transistor 14 is low level, rectifying transistor 14 is connected, electric current in first rectification circuit D1 flows to the output end of the first rectification circuit D1 from the input terminal of the first rectification circuit D1, and filter capacitor C2 charges at this time.In the case where voltage of the voltage of the input terminal of the first rectification circuit D1 less than the output end of the first rectification circuit, the grid of rectifying transistor 14 is high level, rectifying transistor 14 ends, prevent the electric current in the first rectification circuit D1 from flowing to the input terminal of the first rectification circuit D1 from the output end of the first rectification circuit D1, filter capacitor C2 discharges at this time.

It should be noted that rectifier as shown in Figure 9 provided in an embodiment of the present invention, the input terminal of rectifier is the input terminal of the first rectification circuit D1, and the output end of rectifier is the output end of the first rectification circuit D1.

It include rectification circuit (the first i.e. above-mentioned rectification circuit) and filter capacitor in rectifier provided in an embodiment of the present invention, wherein, biasing module in rectification circuit provides bias voltage for comparison module and amplification module, comparison module is allowed to compare the output voltage of the input voltage of the input terminal of rectification circuit and the output end of rectification circuit, and amplification module is output a control signal to according to the result of the comparison, then the control signal that amplification module can export comparison module amplifies, and amplified control signal is output to the grid of rectifying transistor, to control rectifying transistor on or off, it is rectified to control the AC signal of input terminal input of the rectification circuit to rectification circuit, and by filter capacitor to rectifier circuit rectifies After AC signal afterwards is filtered, to be translated into direct current signal；And since biasing module is the threshold voltage that the bias voltage that comparison module and amplification module provide is less than transistor, can so it make in the case where the input voltage of the input terminal of rectification circuit is less than the threshold voltage of transistor, comparison module and amplification module in rectification circuit provided in an embodiment of the present invention can work normally, to ensure that rectification circuit provided in an embodiment of the present invention can be worked normally in the case where the input voltage of the input terminal of rectification circuit is less than the threshold voltage of transistor, namely it ensure that rectifier provided in an embodiment of the present invention can be worked normally in the case where the input voltage of the input terminal of rectifier is less than the threshold voltage of transistor.

Optionally, rectifier provided in an embodiment of the present invention further includes negative voltage converter, and the output end of the negative voltage converter is connect with the input terminal of the first rectification circuit.Wherein, the input terminal of the negative voltage converter is for inputting AC signal to be rectified, the output end of the negative voltage converter is used to input the transformed AC signal of negative voltage converter the input terminal of first rectification circuit, i.e. the transformed AC signal is after first rectifier circuit rectifies, it is exported after being filtered using filter capacitor, that is the direct current signal after the AC signal rectification of rectification is treated in the output end output of the rectifier, so as to realize the rectification for the AC signal for treating rectification.

Optionally, in conjunction with Fig. 9, as shown in Figure 10, rectifier provided in an embodiment of the present invention further includes the second rectification circuit D2 and input control module 16, and the second rectification circuit D2 can be the rectification circuit in above-mentioned Fig. 8.

Wherein, the input terminal (Input1 is expressed as in Figure 10) of first rectification circuit D1 and the input terminal (Input2 is expressed as in Figure 10) of the second rectification circuit D2 connect input control module 16, and the output end of the first rectification circuit D1 connects the output end of the second rectification circuit D2 (output end of the D2 of the first rectification circuit D1 output end and the second rectification circuit is represented as Output in Figure 10).

Input control module 16, for inputting the input terminal of the first rectification circuit D1 in first time period control differential input signal, so that the first rectification circuit D1 works, and controls the input terminal that the differential input signal inputs the second rectification circuit D2 in second time period, so that the second rectification circuit D2 works.

Above-mentioned differential input signal can be provided by the differential voltage source in Figure 10.Specifically, The differential voltage source can provide differential input signal (i.e. the first input signal V1 and the second input signal V2 form differential input signal) by the first input signal V1 and the second input signal V2 for the first rectification circuit D1 and the second rectification circuit D2.

In the embodiment of the present invention, above-mentioned differential input signal is AC signal to be rectified.

Specifically, when the first input signal V1 is greater than the second input signal V2, that is when the differential input signal of the input terminal input of rectifier is in positive half period (first time period), input control module 16 controls the input terminal that differential input signal inputs the first rectification circuit D1, so that the first rectification circuit D1 works；When the first input signal V1 is less than the second input signal V2, that is when the differential input signal of rectifier input is in negative half-cycle (second time period), input control module 16 controls the input terminal that differential input signal inputs the second rectification circuit D2, so that the second rectification circuit works；When the first input signal V1 is equal to the second input signal V2, differential input signal 0, rectifier does not work at this time.

It should be noted that, rectifier as shown in Figure 10 provided in an embodiment of the present invention, the input terminal of rectifier is the input terminal of the first rectification circuit D1 and the second rectification circuit D2, and the output end of rectifier is the output end of the first rectification circuit D1 and the second rectification circuit D2.

Rectifier provided in an embodiment of the present invention can pass through input control module, the input terminal of the first rectification circuit is inputted in first time period control differential input signal, so that the first rectification circuit works, and input control module can be passed through, the input terminal of the second rectification circuit is inputted in first time period control differential input signal, to control the work of the second rectification circuit, differential input signal is rectified so as to control the first rectification circuit in rectifier when the differential input signal that the input terminal of rectifier inputs is in positive half period, and the second rectification circuit in control rectifier rectifies differential input signal when the differential input signal that the input terminal of rectifier inputs is in negative half-cycle, and after being filtered by filter capacitor to the AC signal after the first rectification circuit or the second rectifier circuit rectifies, to be converted For direct current signal.

It include rectification circuit (i.e. the first rectification circuit and the second rectification circuit), input control module and filter capacitor in rectifier provided in an embodiment of the present invention, wherein, biasing module in rectification circuit provides bias voltage for comparison module and amplification module, so that comparison module can be with Compare the output voltage of the input voltage of the input terminal of rectification circuit and the output end of rectification circuit, and amplification module is output a control signal to according to the result of the comparison, then the control signal that amplification module can export comparison module amplifies, and amplified control signal is output to the grid of rectifying transistor, to control rectifying transistor on or off, it is rectified to control the AC signal of input terminal input of the rectification circuit to rectification circuit, and after being filtered by filter capacitor to the AC signal after rectifier circuit rectifies, to be translated into direct current signal；And since biasing module is the threshold voltage that the bias voltage that comparison module and amplification module provide is less than transistor, can so it make in the case where the input voltage of the input terminal of rectification circuit is less than the threshold voltage of transistor, comparison module and amplification module in the rectification circuit can work normally, to ensure that the rectification circuit can be worked normally in the case where the input voltage of the input terminal of rectification circuit is less than the threshold voltage of transistor, namely it ensure that rectifier provided in an embodiment of the present invention can be worked normally in the case where the input voltage of the input terminal of rectifier is less than the threshold voltage of transistor

Optionally, in conjunction with Figure 10, as shown in figure 11, the above-mentioned input control module 16 in rectifier provided in an embodiment of the present invention includes: the 16th transistor M16 and the 17th transistor M17.

Wherein, the grid of the 16th transistor M16 connects the input terminal Input1 of the first rectification circuit, the input terminal Input2 of drain electrode the second rectification circuit of connection of the 16th transistor M16, the source electrode ground connection of the 16th transistor M16；The grid of 17th transistor M17 connects the input terminal Input2 of the second rectification circuit, the input terminal Input1 of drain electrode the first rectification circuit of connection of the 17th transistor M17, the source electrode ground connection of the 17th transistor M17.

It should be noted that, rectifier as shown in figure 11 provided in an embodiment of the present invention, the input terminal of rectifier is the input terminal of the first rectification circuit D1 and the second rectification circuit D2, and the output end of rectifier is the output end of the first rectification circuit D1 and the second rectification circuit D2.

Optionally, the 16th transistor M16 and the 17th transistor M17 shown in Figure 11 provided in an embodiment of the present invention can be the MOS transistor of N-channel.

Specifically, when the first input signal is greater than the second input signal, i.e. when the differential input signal of the input terminal input of rectifier is in positive half period (first time period), the 16th Transistor turns, the 17th transistor cutoff, differential input signal input the input terminal of the first rectification circuit, so that the first rectification circuit works, the input terminal of the second rectification circuit does not have signal input at this time, and the second rectification circuit does not work；When the first input signal is less than the second input signal, that is when the differential input signal of the input terminal input of rectifier is in negative half-cycle (second time period), 17th transistor turns, 16th transistor cutoff, differential input signal inputs the input terminal of the second rectification circuit, so that the second rectification circuit works, the input terminal of the first rectification circuit does not have signal input at this time, and the first rectification circuit does not work.

Rectifier provided in an embodiment of the present invention can be by controlling the 16th transistor turns in first time period, 17th transistor cutoff, differential input signal is rectified so as to control the first rectification circuit in rectifier when the differential input signal that the input terminal of rectifier inputs is in positive half period, and in second time period, control the 17th transistor turns, 16th transistor cutoff, differential input signal is rectified so as to control the second rectification circuit in rectifier when the differential input signal that the input terminal of rectifier inputs is in negative half-cycle, and after being filtered by filter capacitor to the AC signal after the first rectification circuit and the second rectifier circuit rectifies, to be translated into direct current signal.

Include in rectifier provided in an embodiment of the present invention rectification circuit (i.e. the first rectification circuit and the second rectification circuit), input control module and filter capacitor, wherein, biasing module in rectification circuit provides bias voltage for comparison module and amplification module, comparison module is allowed to compare the output voltage of the input voltage of the input terminal of rectification circuit and the output end of rectification circuit, and amplification module is output a control signal to according to the result of the comparison, then the control signal that amplification module can export comparison module amplifies, and amplified control signal is output to the grid of rectifying transistor, to control rectifying transistor on or off, it is rectified to control the AC signal of input terminal input of the rectification circuit to rectification circuit, and after being filtered by filter capacitor to the AC signal after rectifier circuit rectifies, with by its It is converted into direct current signal；And since biasing module is the threshold voltage that the bias voltage that comparison module and amplification module provide is less than transistor, can so it make in the case where the input voltage of the input terminal of rectification circuit is less than the threshold voltage of transistor, comparison module and amplification module in the rectification circuit also can work normally, to ensure that the rectification circuit can be worked normally in the case where the input voltage of the input terminal of rectification circuit is less than the threshold voltage of transistor Namely it ensure that rectifier provided in an embodiment of the present invention can be worked normally in the case where the input voltage of the input terminal of rectifier is less than the threshold voltage of transistor.

It should be noted that the substrate of the MOS transistor of P-channel is needed in high level according to the working characteristics of MOS transistor；The substrate of MOS transistor N-channel type is needed in low level, therefore, in rectification circuit and/or rectifier provided in an embodiment of the present invention, by the drain electrode of the substrate connection rectifying transistor 14 of rectifying transistor 14 (MOS transistor of P-channel), and by MOS transistor (the third transistor M3 of the P-channel in addition to rectifying transistor 14, 5th transistor M5, 7th transistor M7, 8th transistor M8, 11st transistor, tenth two-transistor 12 and the 15th transistor M15) substrate be all connected with the source electrode of the transistor, to guarantee that the substrate of the MOS transistor of above-mentioned P-channel is in high level；The substrate of the MOS transistor (the first transistor M1, second transistor M2, the 4th transistor M4, the 6th transistor M6, the 9th transistor M9, the tenth transistor M10, the 13rd transistor M13, the 14th transistor M14, the 16th transistor M16 and the 17th transistor M17) of N-channel is all connected with to the source electrode of the transistor, low level at substrate to guarantee the MOS transistor of above-mentioned N-channel, the connection type of the substrate of the MOS transistor in the specific embodiment of the present invention is referring to above-mentioned such as Fig. 2 to rectification circuit shown in Fig. 8 and rectifier as shown in figure 11.

Optionally, the rectification circuit in the embodiment of the present invention can be used for full-wave rectification, can be used for halfwave rectifier.Further, the rectification circuit in the application can be replaced with by the diode in the circuit (such as voltage-multiplying circuit, charge pump circuit) for being used to be converted to AC signal direct current signal in the prior art or with the CMOS that diode connects, to form new rectifier.

The equipment that the embodiment of the present invention also protects a kind of collecting energy; it include above-mentioned rectifier in the equipment; using the equipment collecting energy (such as; acquire vibration energy, electromagnetic wave energy etc.) during; after converting AC signal for the energy; it needs to rectify AC signal by rectifier, and supplies load by being converted into direct current signal after filter filtering and use, to realize the acquisition and utilization of the energy.

The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, anyone skilled in the art the invention discloses skill It within the scope of art, can easily think of the change or the replacement, should be covered by the protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A kind of rectification circuit, it is characterized in that, it include: biasing module, comparison module, amplification module and rectifying transistor, the power end of the biasing module connects the output end of the rectification circuit, the output end of the biasing module connects the offset side of the comparison module and the offset side of the amplification module, the first input end of the comparison module connects the input terminal of the rectification circuit, second input terminal of the comparison module connects the output end of the rectification circuit, the output end of the comparison module connects the input terminal of the amplification module, the power end end of the amplification module connects the output end of the rectification circuit, the output end of the amplification module connects the grid of the rectifying transistor, the source electrode of the rectifying transistor connects the input terminal of the rectification circuit, the drain electrode of the rectifying transistor connects the rectification circuit Output end；

   The biasing module, for providing bias voltage for the comparison module and the amplification module, the bias voltage is less than the threshold voltage of transistor；

   The output voltage of the output end of the comparison module, the input voltage of the input terminal for the rectification circuit and the rectification circuit, and the amplification module is output a control signal to according to the result of the comparison；

   The amplification module, for being amplified to the control signal, and by the amplified grid for controlling signal and being output to the rectifying transistor, to control the rectifying transistor on or off.
2. Rectification circuit according to claim 1, it is characterized in that, the biasing module includes: first resistor, the first transistor, second transistor, third transistor, the 4th transistor, the 5th transistor and the 6th transistor, one end of the first resistor is the power end of the biasing module, and the drain electrode of the 5th transistor is the output end of the biasing module；Wherein,

   One end of the first resistor connects the output end, the source electrode of the 4th transistor and the source electrode of the 5th transistor of the rectification circuit, and the other end of the first resistor connects the grid of the first transistor and the grid of the second transistor；The drain electrode of the first transistor connects the grid of the first transistor, and the source electrode of the first transistor connects drain electrode and the grid of the third transistor of the second transistor；The source electrode of the second transistor is grounded；The drain electrode of the third transistor connects the drain electrode of the 4th transistor, the source electrode ground connection of the third transistor；The grid of 4th transistor connects drain electrode and the institute of the 4th transistor State the grid of the 5th transistor；The drain electrode of 5th transistor connects drain electrode and the grid of the 6th transistor of the 6th transistor, the source electrode ground connection of the 6th transistor.
3. Rectification circuit according to claim 1 or 2, it is characterized in that, the comparison module includes: the 7th transistor, the 8th transistor, the 9th transistor and the tenth transistor, the grid of 9th transistor is the offset side of the comparison module, the source electrode of 7th transistor is the first input end of the comparison module, the source electrode of 8th transistor is the second input terminal of the comparison module, and the drain electrode of the 8th transistor is the output end of the comparison module；Wherein,

   The grid of 7th transistor connect the drain electrode of the 7th transistor, the 8th transistor grid and the 9th transistor drain electrode, the source electrode of the 7th transistor connects the input terminal of the rectification circuit；The drain electrode of 8th transistor connects the drain electrode of the tenth transistor, and the source electrode of the 8th transistor connects the output end of the rectification circuit；The grid of 9th transistor connects the grid of the tenth transistor, the source electrode of the 9th transistor and the source electrode ground connection of the tenth transistor.
4. According to claim 1 to rectification circuit described in 3 any one, it is characterized in that, the amplification module includes: the 11st transistor, the tenth two-transistor, the 13rd transistor, the 14th transistor, the grid of 13rd transistor is the offset side of the amplification module, the grid of 11st transistor is the input terminal of the amplification module, the source electrode of 11st transistor is the second input supply terminal of the amplification module, and the drain electrode of the tenth two-transistor is the output end of the amplification module；Wherein,

   The grid of 11st transistor connects the output end of the comparison module, the drain electrode of 11st transistor connects the drain electrode of the grid and the 13rd transistor of the tenth two-transistor, and the source electrode of the 11st transistor connects the output end of the rectification circuit and the source electrode of the tenth two-transistor；The drain electrode of tenth two-transistor connects the drain electrode of the 14th transistor；The grid of 13rd transistor connects the output end of the biasing module and the grid of the 14th transistor, the source electrode of the 13rd transistor and the source electrode ground connection of the 14th transistor.
5. Rectification circuit according to any one of claims 1 to 4, which is characterized in that the rectification circuit further includes starting module, and the power end of the starting module connects the rectification The input terminal of circuit, the input terminal of the starting module connect the output end of the rectification circuit, and the output end of the starting module connects the offset side of the comparison module and the offset side of the amplification module；

   The starting module, for providing bias voltage for the comparison module and the amplification module in the case where the output end of the rectification circuit does not have output voltage.
6. Rectification circuit according to claim 5, it is characterized in that, the starting module includes the 15th transistor, the grid of 15th transistor is the input terminal of the starting module, the source electrode of 15th transistor is the power end of the starting module, and the drain electrode of the 15th transistor is the output end of the starting module；Wherein,

   The grid of 15th transistor connects the output end of the rectification circuit, the drain electrode of 15th transistor connects the offset side of the comparison module and the offset side of the amplification module, and the source electrode of the 15th transistor connects the input terminal of the rectification circuit.
7. According to claim 1 to rectification circuit described in 6 any one, it is characterized in that, the rectification circuit further includes electric capacity of voltage regulation, and one end of the electric capacity of voltage regulation connects the output end of the biasing module and the output end of the starting module, the other end ground connection of the electric capacity of voltage regulation.
8. A kind of rectifier, it is characterised in that it includes the first rectification circuit and filter capacitor, first rectification circuit is the rectification circuit as described in claim 1-7 any one, one end of the filter capacitor connects the output end of first rectification circuit, the other end ground connection of the filter capacitor.
9. Rectifier according to claim 8, it is characterized in that, the rectifier further includes the second rectification circuit and input control module, second rectification circuit is the rectification circuit as described in claim 1-7 any one, the input terminal of first rectification circuit connects the input control module with the input terminal of second rectification circuit, and the output end of first rectification circuit connects the output end of second rectification circuit；

   The input control module, for inputting the input terminal of first rectification circuit in first time period control differential input signal, so that the first rectification circuit work, and the input terminal that the differential input signal inputs second rectification circuit is controlled in second time period, so that second rectification circuit works.
10. Rectifier according to claim 9, which is characterized in that the input control Module includes: the 16th transistor and the 17th transistor；Wherein,

    The grid of 16th transistor connects the input terminal of first rectification circuit, and the drain electrode of the 16th transistor connects the input terminal of second rectification circuit, the source electrode ground connection of the 16th transistor；The grid of 17th transistor connects the input terminal of second rectification circuit, and the drain electrode of the 17th transistor connects the input terminal of first rectification circuit, the source electrode ground connection of the 17th transistor.