CN212675389U - Analog signal output circuit applied to laser - Google Patents
Analog signal output circuit applied to laser Download PDFInfo
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- CN212675389U CN212675389U CN202021612750.1U CN202021612750U CN212675389U CN 212675389 U CN212675389 U CN 212675389U CN 202021612750 U CN202021612750 U CN 202021612750U CN 212675389 U CN212675389 U CN 212675389U
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- output circuit
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Abstract
The utility model relates to a laser instrument technical field especially relates to an analog signal output circuit who is applied to in laser instrument. The digital signal amplifier comprises a digital signal output circuit, a ladder resistance network and a high-speed operational amplifier, wherein the digital signal output circuit, the ladder resistance network and the high-speed operational amplifier are sequentially and electrically connected. The output circuit can flexibly control the resolution.
Description
Technical Field
The utility model relates to a laser instrument technical field especially relates to an analog signal output circuit who is applied to in laser instrument.
Background
In a circuit in the field of a laser, a digital signal needs to be converted into an analog signal for output, and in the prior art, a high-speed D/a conversion chip is generally directly used, but when the high-speed D/a conversion chip is used for converting the digital signal into the analog signal, the resolution is limited by the D/a conversion chip, and the high-speed D/a conversion chip is not flexible enough.
Disclosure of Invention
The utility model discloses the technical problem that will solve is: an analog signal output circuit applied to a laser capable of flexibly controlling resolution is provided.
The technical proposal adopted by the utility model is that: an analog signal output circuit applied to a laser comprises a digital signal output circuit, a ladder resistance network and a high-speed operational amplifier, wherein the digital signal output circuit, the ladder resistance network and the high-speed operational amplifier are sequentially and electrically connected.
The ladder-type resistor network is an R-2R ladder-type resistor network.
The digital signal output circuit is provided with N output I/O ports, the ladder resistance network comprises N +1 first resistors and N-1 second resistors, the N +1 first resistors are numbered from No. 1 to No. N +1, and the N-1 second resistors are numbered from No. 1 to No. N-1, each output I/O port is connected with one end of the first resistors from No. 1 to No. N, the other ends of the first resistors from No. 1 to No. N-1 are connected with one end of the second resistors from No. 1 to No. N-1, the first resistor from No. 1 and the second resistor from No. 1 are grounded through the first resistor from No. N +1, the other ends of the second resistors from No. 1 to No. N-2 are connected with the other ends of the first resistors from No. 2 to No. N-1, and the other end of the first resistor from No. N is directly connected with the analog signal output end, the other end of the second resistor of the No. N-1 resistor is also directly connected with the analog signal output end, the resistance value of the first resistor is 2R, and the resistance value of the second resistor is R.
The high-speed operational amplifier is an integrated operational amplifier chip.
Compared with the prior art in the structure more than adopting, the utility model has the advantages of it is following: the analog signal output waveform is edited through the ladder resistance network and the high-speed operational amplifier, so that the adjustable resolution can be realized, the problem that the resolution of a D/A conversion chip is limited is avoided, the design is more flexible, and the structure cost is lower by adopting the method and the device.
Drawings
Fig. 1 is a block diagram of the module connection of the analog signal output circuit applied to the laser of the present invention.
Fig. 2 is a schematic diagram of a ladder-shaped resistor network applied to an analog signal output circuit in a laser device.
Detailed Description
The present invention will be further described below with reference to specific embodiments, but the present invention is not limited to the following specific embodiments.
An analog signal output circuit applied to a laser is applied to the laser, as shown in fig. 1, and mainly comprises a digital signal output circuit, a ladder resistance network and a high-speed operational amplifier, wherein:
the digital signal output circuit is mainly an I/O port which comprises FPGA, CPLD, singlechip and other control chips for outputting;
the ladder resistance network is shown in figure 2 and is an R-2R ladder resistance network, which mainly comprises N +1 first resistors and N-1 second resistors, wherein the N +1 first resistors are numbered from No. 1 to No. N +1, and the N-1 second resistors are numbered from No. 1 to No. N-1, each output I/O port is connected with one end of the first resistors from No. 1 to No. N, the other ends of the first resistors from No. 1 to No. N-1 are connected with one ends of the second resistors from No. 1 to No. N-1, the first resistor from No. 1 and the second resistor from No. 1 are grounded through the first resistor from No. N +1, the other ends of the second resistors from No. 1 to No. N-2 are connected with the other ends of the first resistors from No. 2 to No. N-1, and the other end of the first resistor from No. N is directly connected with an analog signal output end, the other end of the second resistor of the No. N-1 resistor is also directly connected with the analog signal output end, the resistance value of the first resistor is 2R, the resistance value of the second resistor is R, and N is 7 in the specific embodiment;
the high-speed operational amplifier is an integrated operational amplifier chip with higher bandwidth;
the digital signal output circuit outputs (digital I/O) a plurality of BIT digital signals to a ladder resistance network, the ladder resistance network outputs to a high-speed operational amplifier, and the operational amplifier outputs analog signals. The number of the plurality of BIT digital signals is more than or equal to 2, the precision of the circuit can be improved along with the increase of the number of digital I/O (input/output) signals, namely the number of I/O ports output by control chips such as an FPGA (field programmable gate array), a CPLD (complex programmable logic device), a singlechip and the like, and the situation that the design is too redundant or insufficient can be avoided according to the design requirement.
The circuit has adjustable precision, the resolution can be improved along with the increase of the number of digital I/Os, the design is more flexible compared with the prior common DAC scheme, and the defect that the resolution is limited is avoided. In addition, the hair drying cost of the invention is lower, and the invention is applied to a laser to generate a modulation signal.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (4)
1. An analog signal output circuit applied to a laser, characterized in that: the digital signal amplifier comprises a digital signal output circuit, a ladder resistance network and a high-speed operational amplifier, wherein the digital signal output circuit, the ladder resistance network and the high-speed operational amplifier are sequentially and electrically connected.
2. The analog signal output circuit of claim 1, wherein: the ladder-type resistor network is an R-2R ladder-type resistor network.
3. The analog signal output circuit of claim 2, wherein: the digital signal output circuit is provided with N output I/O ports, the ladder resistance network comprises N +1 first resistors and N-1 second resistors, the N +1 first resistors are numbered from No. 1 to No. N +1, and the N-1 second resistors are numbered from No. 1 to No. N-1, each output I/O port is connected with one end of the first resistors from No. 1 to No. N, the other ends of the first resistors from No. 1 to No. N-1 are connected with one end of the second resistors from No. 1 to No. N-1, the first resistor from No. 1 and the second resistor from No. 1 are grounded through the first resistor from No. N +1, the other ends of the second resistors from No. 1 to No. N-2 are connected with the other ends of the first resistors from No. 2 to No. N-1, and the other end of the first resistor from No. N is directly connected with the analog signal output end, the other end of the second resistor of the No. N-1 resistor is also directly connected with the analog signal output end, the resistance value of the first resistor is 2R, and the resistance value of the second resistor is R.
4. The analog signal output circuit of claim 1, wherein: the high-speed operational amplifier is an integrated operational amplifier chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021612750.1U CN212675389U (en) | 2020-08-06 | 2020-08-06 | Analog signal output circuit applied to laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021612750.1U CN212675389U (en) | 2020-08-06 | 2020-08-06 | Analog signal output circuit applied to laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212675389U true CN212675389U (en) | 2021-03-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021612750.1U Active CN212675389U (en) | 2020-08-06 | 2020-08-06 | Analog signal output circuit applied to laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212675389U (en) |
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2020
- 2020-08-06 CN CN202021612750.1U patent/CN212675389U/en active Active
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