CN2884287Y - Circuit for starting current-source or valtage-source - Google Patents
Circuit for starting current-source or valtage-source Download PDFInfo
- Publication number
- CN2884287Y CN2884287Y CN 200520046570 CN200520046570U CN2884287Y CN 2884287 Y CN2884287 Y CN 2884287Y CN 200520046570 CN200520046570 CN 200520046570 CN 200520046570 U CN200520046570 U CN 200520046570U CN 2884287 Y CN2884287 Y CN 2884287Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- diode
- current
- phase inverter
- voltage source
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Control Of Electrical Variables (AREA)
Abstract
The utility model relates to a startup circuit connected with the current supply or the voltage source for current or voltage supply. The utility model is characterized in that the startup circuit is used to produce a proper electric level at a point (A) so as to get rid of the zero bias current in the current supply circuit. The circuit consists of a capacitance for grounding or for power supply, an inverter, and a NMOS element in the form of diode connection. In the circuit, the input of the inverter is connected with the negative part of the diode, and the inverter output with the positive part. One end of the capacitance is connected with the negative part of the diode, with the other end to the grounding or power supply. With the adoption of the above-mentioned technical solution, the current supply or the voltage source irrelevant to power supply is not at zero bias current nor is restricted by the power voltage any more.
Description
Technical field
The utility model relates to start-up circuit, relates in particular to a kind of current source of degeneracy bias point or start-up circuit of voltage source circuit of existing.
Background technology
As shown in Figure 1, with the current source or voltage source circuit of supply independent in, have one very important problem be the existence of degeneracy bias point.When power supply electrifying, if all transistors are zero current, then they can stably remain on this state, that is to say, circuit can steady operation at the state of zero current, this duty is that we are undesirable, because this moment, circuit can't provide biasing for other circuit; Another kind of duty is M3 and M4, because the effect of current mirror, and have identical electric current, thus can provide biasing for other circuit.A kind of duty in back is desired.So, how to break away from the current source of supply independent or voltage source circuit in have the problem of degeneracy bias point, also be, the startup problem that is called as current source or voltage source circuit, generally can solve by increasing a kind of start-up circuit, this circuit can order about circuit and break away from the degeneracy bias point when power supply electrifying.
Existing start-up circuit, as shown in Figure 2, for the nmos device M5 of diode type of attachment provides when powering on from VDD through M3, M5, the M1 current path to ground.Thereby, M3 and M1, and M2 and M4 can not keep zero current condition.Certainly, this method only is only practical under the situation of Vth1+Vth5+|Vth3|＜VDD and Vgs1+Vth5+|Vgs3|＞VDD, and last condition is in order to guarantee to exist through M3, M5, M1 from VDD the current path on ground; The condition in back is in order to guarantee that M5 keeps turn-offing behind circuit start, thereby guarantees to equate by the electric current of M1～M4.Clearly, this circuit requires too high to VDD, make the application of circuit be very restricted.
The utility model content
The purpose of this utility model is to provide the start-up circuit of a kind of current source or voltage source circuit, makes the duty of both having broken away from the zero current biasing with the current source or the voltage source circuit of supply independent, no longer is subjected to the restriction of supply voltage again.
The start-up circuit of a kind of current source provided by the utility model is connected on the current source, it is characterized in that: this start-up circuit is used for producing a suitable level at point (A), with the state of the zero offset electric current in the let-go current source circuit.
The start-up circuit of above-mentioned current source comprises the nmos device of direct earth capacitance, phase inverter and diode type of attachment, and wherein: the phase inverter input connects the diode negative terminal, and phase inverter output connects diode anode, electric capacity one terminating diode negative terminal, other end ground connection.
The start-up circuit of above-mentioned current source, the nmos device that comprises the electric capacity, phase inverter and the diode type of attachment that connect power supply, wherein: the phase inverter input connects the diode negative terminal, and phase inverter output connects the diode anode, electric capacity one terminating diode negative terminal, other end power supply.
The utility model also provides a kind of start-up circuit of voltage source, is connected on the voltage source, it is characterized in that, this start-up circuit is used for producing a suitable level at point (A), to break away from the state of the zero offset electric current in the voltage source circuit.
The start-up circuit of above-mentioned voltage source comprises the nmos device of direct earth capacitance, phase inverter and diode type of attachment, and wherein: the phase inverter input connects the diode negative terminal, and phase inverter output connects diode anode, electric capacity one terminating diode negative terminal, other end ground connection.
The start-up circuit of above-mentioned voltage source, the nmos device that comprises the electric capacity, phase inverter and the diode type of attachment that connect power supply, wherein: the phase inverter input connects the diode negative terminal, and phase inverter output connects the diode anode, electric capacity one terminating diode negative terminal, other end power supply.
Owing to adopted above-mentioned technical solution, make the duty of both having broken away from the zero current biasing with the current source or the voltage source circuit of supply independent, no longer be subjected to the restriction of supply voltage again.
Description of drawings
Fig. 1 is the schematic diagram of the current source circuit of available technology adopting;
Fig. 2 is the schematic diagram of the current source start-up circuit of available technology adopting;
Fig. 3 is the schematic diagram of the utility model current source or a kind of form of voltage source start-up circuit; And
Fig. 4 is the schematic diagram of the utility model current source or the another kind of form of voltage source start-up circuit.
Embodiment
The utility model is in the existing start-up circuit VDD being required too high problem, the modification of carrying out.
Referring to Fig. 3, the start-up circuit of the utility model current source or voltage source comprises metal-oxide-semiconductor M6, M7 and capacitor C, M5 still is connected into the diode form, M6, M7 is connected into the phase inverter form, and wherein: the phase inverter input connects the diode negative terminal, and phase inverter output connects the diode anode, capacitor C one terminating diode negative terminal, other end ground connection.The phase inverter input end A current potential of ordering begins to keep zero level after powering on like this, thereby the output of phase inverter equals VDD, but rising along with VDD, as VDD during greater than Vth5, because A point current potential equals VDD-Vth5, so A point current potential raises the impossible zero level that keeps of A point with VDD, thereby can start the current source or the voltage source circuit on the right, break away from the duty of zero current.After A point current potential raises simultaneously, inverter output voltage step-down, because diode is anti-inclined to one side, the A point can not return to zero level again.
Fig. 4 changes on the basis of Fig. 3 slightly, and capacitor C one end still connects the diode negative terminal, but another termination VDD.The A current potential of ordering can not keep zero level equally after powering on like this, thereby can start the current source or the voltage source circuit on the right, breaks away from the duty of zero current.
Above embodiment is only for the usefulness that the utility model is described, but not to restriction of the present utility model, person skilled in the relevant technique, under the situation that does not break away from spirit and scope of the present utility model, can also make various conversion or variation, so all technical schemes that are equal to also should belong to category of the present utility model and should be limited by each claim.
Claims (2)
1, a kind of start-up circuit of current source, be connected on the current source, it is characterized in that: this start-up circuit is used for producing a suitable level at point (A), state with the zero offset electric current in the let-go current source circuit, it comprises the nmos device (M5) of direct earth capacitance (C), phase inverter (M6, M7) and diode type of attachment, wherein: phase inverter (M6, M7) input connects diode (M5) negative terminal, phase inverter (M6, M7) output connects diode (M5) anode, electric capacity (C) terminating diode (M5) negative terminal, other end ground connection or connect power supply.
2, a kind of start-up circuit of voltage source, be connected on the voltage source, it is characterized in that, this start-up circuit is used for producing a suitable level at point (A), to break away from the state of the zero offset electric current in the voltage source circuit, it comprises the nmos device (M5) of direct earth capacitance (C), phase inverter (M6, M7) and diode type of attachment, wherein: phase inverter (M6, M7) input connects diode (M5) negative terminal, phase inverter (M6, M7) output connects diode (M5) anode, electric capacity (C) terminating diode (M5) negative terminal, other end ground connection or connect power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520046570 CN2884287Y (en) | 2005-11-16 | 2005-11-16 | Circuit for starting current-source or valtage-source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520046570 CN2884287Y (en) | 2005-11-16 | 2005-11-16 | Circuit for starting current-source or valtage-source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2884287Y true CN2884287Y (en) | 2007-03-28 |
Family
ID=37957342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520046570 Expired - Lifetime CN2884287Y (en) | 2005-11-16 | 2005-11-16 | Circuit for starting current-source or valtage-source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2884287Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101458539B (en) * | 2007-12-11 | 2011-02-02 | 上海华虹Nec电子有限公司 | Current source circuit and current source implementing method |
| CN101470457B (en) * | 2007-12-26 | 2011-06-29 | 东部高科股份有限公司 | Bandgap reference voltage generating circuit |
| CN101561688B (en) * | 2008-04-18 | 2011-07-06 | 南亚科技股份有限公司 | Low-voltage current reference and method thereof |
| CN102541136A (en) * | 2010-08-26 | 2012-07-04 | 株式会社半导体能源研究所 | Semiconductor device |
| CN107404312A (en) * | 2017-01-13 | 2017-11-28 | 上海韦玏微电子有限公司 | The start-up circuit of current source and the start-up circuit of voltage source |
| CN107544601A (en) * | 2017-09-06 | 2018-01-05 | 深圳市恒昌通电子有限公司 | A kind of start-up circuit of zero quiescent dissipation |
| CN108089625A (en) * | 2016-11-21 | 2018-05-29 | 新唐科技股份有限公司 | Current source circuit |
| CN111552342A (en) * | 2020-05-21 | 2020-08-18 | 东南大学 | Low-power-consumption reference voltage and reference current generating circuit |
| CN114815944A (en) * | 2022-03-04 | 2022-07-29 | 上海迦美信芯通讯技术有限公司 | GM biasing circuit |
| CN116633116A (en) * | 2023-07-24 | 2023-08-22 | 深圳市思远半导体有限公司 | Low-power consumption current source, current source circuit, chip and electronic equipment with low-power consumption current source circuit |
-
2005
- 2005-11-16 CN CN 200520046570 patent/CN2884287Y/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101458539B (en) * | 2007-12-11 | 2011-02-02 | 上海华虹Nec电子有限公司 | Current source circuit and current source implementing method |
| CN101470457B (en) * | 2007-12-26 | 2011-06-29 | 东部高科股份有限公司 | Bandgap reference voltage generating circuit |
| CN101561688B (en) * | 2008-04-18 | 2011-07-06 | 南亚科技股份有限公司 | Low-voltage current reference and method thereof |
| CN102541136A (en) * | 2010-08-26 | 2012-07-04 | 株式会社半导体能源研究所 | Semiconductor device |
| CN102541136B (en) * | 2010-08-26 | 2015-01-14 | 株式会社半导体能源研究所 | Semiconductor device |
| CN108089625B (en) * | 2016-11-21 | 2020-08-07 | 新唐科技股份有限公司 | Current source circuit |
| CN108089625A (en) * | 2016-11-21 | 2018-05-29 | 新唐科技股份有限公司 | Current source circuit |
| CN107404312A (en) * | 2017-01-13 | 2017-11-28 | 上海韦玏微电子有限公司 | The start-up circuit of current source and the start-up circuit of voltage source |
| CN107404312B (en) * | 2017-01-13 | 2020-11-27 | 上海韦玏微电子有限公司 | Starting circuit of current source and starting circuit of voltage source |
| CN107544601A (en) * | 2017-09-06 | 2018-01-05 | 深圳市恒昌通电子有限公司 | A kind of start-up circuit of zero quiescent dissipation |
| CN107544601B (en) * | 2017-09-06 | 2019-11-22 | 深圳市恒昌通电子有限公司 | A kind of start-up circuit of zero quiescent dissipation |
| CN111552342A (en) * | 2020-05-21 | 2020-08-18 | 东南大学 | Low-power-consumption reference voltage and reference current generating circuit |
| CN114815944A (en) * | 2022-03-04 | 2022-07-29 | 上海迦美信芯通讯技术有限公司 | GM biasing circuit |
| CN116633116A (en) * | 2023-07-24 | 2023-08-22 | 深圳市思远半导体有限公司 | Low-power consumption current source, current source circuit, chip and electronic equipment with low-power consumption current source circuit |
| CN116633116B (en) * | 2023-07-24 | 2024-01-16 | 深圳市思远半导体有限公司 | Low-power consumption current source, current source circuit, chip and electronic equipment with low-power consumption current source circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2884287Y (en) | Circuit for starting current-source or valtage-source | |
| CN103219893B (en) | Switch power controller and switching power circuit | |
| CN107647477B (en) | NMOS tube driving control circuit, chip, device and driving method | |
| CN110311562A (en) | A kind of DC-DC converter | |
| CN101840242A (en) | CMOS low power consumption voltage current offset start-up circuit | |
| CN209103177U (en) | A kind of band-gap reference source circuit with self-start circuit | |
| CN107040250B (en) | A kind of voltage mode driving circuit | |
| CN109491447A (en) | A kind of start-up circuit applied to band-gap reference circuit | |
| CN205566746U (en) | Can eliminate control circuit , control chip and LED illuminator of electric current ripple | |
| CN203951440U (en) | Crystal oscillator | |
| CN109412395A (en) | Power initiation adjusts circuit and power supply circuit | |
| CN110502092B (en) | Power supply circuit and electronic equipment | |
| CN102136794B (en) | Charge pump driving circuit and charge pump system | |
| CN110417243A (en) | A kind of high-voltage MOSFET driving circuit | |
| CN107422773B (en) | Digital low-dropout regulator | |
| CN106339025A (en) | Low-voltage and high-precision band-gap reference circuit applied to node of Internet of Things | |
| CN109412436A (en) | A kind of synchronous rectification control chip and circuit | |
| CN108900081A (en) | A kind of circuit of control negative pressure output | |
| CN104038156A (en) | Crystal oscillator | |
| CN209072364U (en) | A kind of synchronous rectification control chip and circuit | |
| CN208316697U (en) | One kind powering on self-locking control circuit and power supply | |
| CN209593257U (en) | Multipath voltage regulation output switch power source | |
| CN107967021B (en) | Control circuit of MOS tube driving voltage | |
| CN202616756U (en) | Undervoltage protecting circuit of switching power supply | |
| TW201117541A (en) | Dc-dc converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070328 |
|
| EXPY | Termination of patent right or utility model |