CN103546122A - Signal source circuit - Google Patents
Signal source circuit Download PDFInfo
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- CN103546122A CN103546122A CN201310411118.9A CN201310411118A CN103546122A CN 103546122 A CN103546122 A CN 103546122A CN 201310411118 A CN201310411118 A CN 201310411118A CN 103546122 A CN103546122 A CN 103546122A
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- amplifier
- resistance
- signal source
- electric capacity
- source circuit
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Abstract
The invention discloses a signal source circuit comprising resistors, capacitors and operational amplifiers. Output voltage signals can be controlled by adjusting the amplitude of input signals, so that controllability is high. The signal source circuit is simple in circuit structure, low in cost, high in stability and applicable to small laboratories.
Description
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Technical field
The present invention relates to a kind of measuring circuit, particularly a kind of signal source circuit.
Background technology
Signal source circuit is the core unit circuit of analog integrated circuit; especially in power management class chip; signal source has often determined the performance index of this type of chip, and it is widely used in the various simulations such as oscillator, phase-locked loop and data converter and hybrid digital-analog integrated circuit.But its circuit is complicated, and power consumption is large, be not easy to low-power system application.
Therefore need a kind of new technical scheme to solve the problems referred to above.
Summary of the invention
Goal of the invention: the problem and shortage existing for above-mentioned prior art, the object of this invention is to provide a kind of signal source circuit, its cost is low, waveform stabilization output.
Technical scheme: the technical solution adopted in the present invention is a kind of signal source circuit, comprise resistance, electric capacity and amplifier, the inverting input of the first amplifier is by the positive pole of the 4th resistance and the first electric capacity access input signal source, the normal phase input end of this first amplifier is connected with the negative pole of input signal source by the 4th electric capacity, the two ends of the 4th electric capacity are parallel with the 3rd resistance, the normal phase input end of the first amplifier is connected with the normal phase input end of the second amplifier, the output signal of the first amplifier is the inverting input to the first amplifier by the 5th resistance feedback, the output signal of the first amplifier inputs to the inverting input of the second amplifier by the series connection of the 3rd electric capacity and the 6th resistance, the output signal of the second amplifier is the inverting input to the second amplifier by the 7th resistance feedback.。
Preferably, the 3rd resistance is by the second resistance access positive voltage.
Preferably, one end of the first electric capacity is by the second electric capacity access positive voltage, and its other end is by the first resistance access positive voltage.
Beneficial effect: compared with prior art, its advantage is that controllability is strong by regulating the amplitude of input signal can control output voltage signal in the present invention, and circuit structure of the present invention is simple, and cost is low, and stability is strong, is applicable to small-size laboratory.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Embodiment
As shown in Figure 1, the present invention includes resistance, electric capacity and amplifier, the inverting input of the first amplifier U1 is by the positive pole of the 4th resistance R 4 and the first capacitor C 1 access input signal source, the normal phase input end of this first amplifier U1 is connected with the negative pole of input signal source by the 4th capacitor C 4, the two ends of the 4th capacitor C 4 are parallel with the 3rd resistance R 3, the normal phase input end of the first amplifier U1 is connected with the normal phase input end of the second amplifier U2, the output signal of the first amplifier U1 feeds back to the inverting input of the first amplifier U1 by the 5th resistance R 5, the output signal of the first amplifier U1 inputs to the inverting input of the second amplifier U2 by the series connection of the 3rd capacitor C 3 and the 6th resistance R 6, the output signal of the second amplifier U2 feeds back to the inverting input of the second amplifier U2 by the 7th resistance R 7.The 3rd resistance R 3 is by the second resistance R 2 access positive voltage VCC, and one end of the first capacitor C 1 is by the second capacitor C 2 access positive voltage VCC, and its other end is by the first resistance R 1 access positive voltage VCC.The output of the second amplifier U2 is output of the present invention.
The present invention is by regulating the amplitude of input signal can control output voltage signal, and controllability is strong, and circuit structure of the present invention is simple, and cost is low, and stability is strong, is applicable to small-size laboratory.
Claims (3)
1. a signal source circuit, it is characterized in that: comprise resistance, electric capacity and amplifier, the inverting input of described the first amplifier (U1) is by the positive pole of the 4th resistance (R4) and the first electric capacity (C1) access input signal source, the normal phase input end of this first amplifier (U1) is connected with the negative pole of input signal source by the 4th electric capacity (C4), the two ends of described the 4th electric capacity (C4) are parallel with the 3rd resistance (R3), the normal phase input end of described the first amplifier (U1) is connected with the normal phase input end of the second amplifier (U2), the output signal of the first amplifier (U1) feeds back to the inverting input of the first amplifier (U1) by the 5th resistance (R5), the output signal of the first amplifier (U1) inputs to the inverting input of the second amplifier (U2) by the series connection of the 3rd electric capacity (C3) and the 6th resistance (R6), the output signal of described the second amplifier (U2) feeds back to the inverting input of the second amplifier (U2) by the 7th resistance (R7).
2. a kind of signal source circuit according to claim 1, is characterized in that: described the 3rd resistance (R3) is by the second resistance (R2) access positive voltage (VCC).
3. a kind of signal source circuit according to claim 1, is characterized in that: one end of described the first electric capacity (C1) is by the second electric capacity (C2) access positive voltage (VCC), and its other end is by the first resistance (R1) access positive voltage (VCC).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310411118.9A CN103546122A (en) | 2013-09-11 | 2013-09-11 | Signal source circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310411118.9A CN103546122A (en) | 2013-09-11 | 2013-09-11 | Signal source circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103546122A true CN103546122A (en) | 2014-01-29 |
Family
ID=49969247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310411118.9A Pending CN103546122A (en) | 2013-09-11 | 2013-09-11 | Signal source circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103546122A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080252366A1 (en) * | 2006-11-30 | 2008-10-16 | Zyion, Inc. | Active Lc Band Pass Filter |
| CN102931952A (en) * | 2012-10-18 | 2013-02-13 | 株洲变流技术国家工程研究中心有限公司 | Synchronous signal acquisition system |
| CN103023463A (en) * | 2012-11-27 | 2013-04-03 | 华为技术有限公司 | Ramp signal generation circuit and ramp signal generator |
-
2013
- 2013-09-11 CN CN201310411118.9A patent/CN103546122A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080252366A1 (en) * | 2006-11-30 | 2008-10-16 | Zyion, Inc. | Active Lc Band Pass Filter |
| CN102931952A (en) * | 2012-10-18 | 2013-02-13 | 株洲变流技术国家工程研究中心有限公司 | Synchronous signal acquisition system |
| CN103023463A (en) * | 2012-11-27 | 2013-04-03 | 华为技术有限公司 | Ramp signal generation circuit and ramp signal generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140129 |