CN214315242U - Electric signal processing circuit - Google Patents
Electric signal processing circuit Download PDFInfo
- Publication number
- CN214315242U CN214315242U CN202120651578.9U CN202120651578U CN214315242U CN 214315242 U CN214315242 U CN 214315242U CN 202120651578 U CN202120651578 U CN 202120651578U CN 214315242 U CN214315242 U CN 214315242U
- Authority
- CN
- China
- Prior art keywords
- circuit
- selection switch
- signal
- operational amplifier
- main
- 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 - Fee Related
Links
Images
Landscapes
- Amplifiers (AREA)
Abstract
The utility model relates to an electric signal processing circuit, including main amplifier circuit, the multiple regulation circuit, DA converting circuit and signal kind select switch, DA converting circuit's signal output part connects signal kind select switch, signal kind select switch connects main amplifier circuit's signal input part, the multiple regulation circuit connects main amplifier circuit's the multiple regulation end, according to the electric signal that treats processing is digital quantity signal or analog quantity signal, can drop into/withdraw from DA converting circuit through signal kind select switch, can handle digital quantity signal and analog quantity signal, promote this electric signal processing circuit's suitability; moreover, the amplification factor of the main amplification circuit can be adjusted through the amplification factor adjusting circuit, so that the electric signal to be processed can be amplified to a proper factor according to actual amplification requirements, and the applicability is improved.
Description
Technical Field
The utility model relates to an electric signal processing circuit.
Background
The existing electric signal processing circuit can only carry out fixed processing on an electric signal, for example, the electric signal processing circuit comprises an amplifier with fixed amplification factor, the electric signal is amplified by fixed amplification factor, the processing process cannot be adjusted according to actual needs, and the applicability is poor.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electric signal processing circuit for solve current electric signal processing circuit and can't adjust the processing procedure according to actual need, the relatively poor technical problem of suitability.
An electrical signal processing circuit comprising: the device comprises a main amplifying circuit, an amplification factor adjusting circuit, a DA (digital-to-analog) conversion circuit and a signal type selection switch;
the signal input end of the DA conversion circuit is used for inputting a digital quantity signal to be processed, the signal output end of the DA conversion circuit is connected with the first fixed end of the signal type selection switch, the second fixed end of the signal type selection switch is used for inputting an analog quantity signal to be processed, the movable end of the signal type selection switch is connected with the signal input end of the main amplification circuit, the amplification factor adjusting circuit is connected with the amplification factor adjusting end of the main amplification circuit, and the signal output end of the main amplification circuit is used for outputting the processed electric signal.
Further, the main amplifying circuit is a main operational amplifier, a non-inverting input terminal of the main operational amplifier is a signal input terminal of the main amplifying circuit, an inverting input terminal and a signal output terminal of the main operational amplifier are amplification factor adjusting terminals of the main amplifying circuit, and a signal output terminal of the main operational amplifier is a signal output terminal of the main amplifying circuit;
the amplification factor adjusting circuit comprises a first resistor and at least two resistor branches, one end of the first resistor is grounded, the other end of the first resistor is connected with the inverting input end of the main operational amplifier and one end of each resistor branch, the other end of each resistor branch is connected with the signal output end of the main operational amplifier, and a second resistor and a switching switch are connected in series in each resistor branch.
Further, the second resistance is an adjustable resistor.
Furthermore, the electric signal processing circuit further comprises a standby amplifying circuit, a first standby selection switch, a second standby selection switch and a third standby selection switch, wherein the standby amplifying circuit is a standby operational amplifier;
the output end of the signal type selection switch is connected with the movable end of the first standby selection switch, the first immovable end of the first standby selection switch is connected with the non-inverting input end of the main operational amplifier, and the second immovable end of the first standby selection switch is connected with the non-inverting input end of the standby operational amplifier;
the other end of the first resistor is connected with the movable end of the second standby selection switch, the first immovable end of the second standby selection switch is connected with the inverting input end of the main operational amplifier, and the second immovable end of the second standby selection switch is connected with the inverting input end of the standby operational amplifier;
the other end of each resistance branch is connected with the movable end of the third standby selection switch, the first immovable end of the third standby selection switch is connected with the signal output end of the main operational amplifier, and the second immovable end of the third standby selection switch is connected with the signal output end of the standby operational amplifier; and the signal output end of the standby operational amplifier is used for outputting the processed electric signal.
Furthermore, the electric signal processing circuit further comprises a fourth standby selection switch and a filter circuit, the signal output end of the main operational amplifier is connected with the first fixed end of the fourth standby selection switch, the signal output end of the standby operational amplifier is connected with the second fixed end of the fourth standby selection switch, and the movable end of the fourth standby selection switch is connected with the signal input end of the filter circuit.
The utility model has the advantages that: the DA conversion circuit can be switched in/out through the signal type selection switch, if the electric signal to be processed is a digital quantity signal, the DA conversion circuit can be switched in to convert the electric signal to be processed into an analog quantity signal, and if the electric signal to be processed is an analog quantity signal, subsequent processing can be directly carried out, so that the electric signal processing circuit can process the digital quantity signal and the analog quantity signal, and the applicability of the electric signal processing circuit is improved; moreover, the amplification factor of the main amplification circuit can be adjusted through the amplification factor adjusting circuit, so that the electric signal to be processed can be amplified to a proper factor according to actual amplification requirements, and the applicability is improved.
Drawings
Fig. 1 is a circuit diagram of an electrical signal processing circuit provided by the present invention.
Detailed Description
The present embodiment provides an electric signal processing circuit including: a main amplifying circuit, an amplification factor adjusting circuit, a DA converting circuit and a signal type selecting switch S1.
The main amplifying circuit is used for amplifying the electric signal to be processed, and the amplification factor adjusting circuit is connected with the amplification factor adjusting end of the main amplifying circuit and used for adjusting the amplification factor of the main amplifying circuit.
The main amplifying circuit can be an operational amplifier, and can also be other types of amplifying chips. The specific circuit structure of the amplification factor adjusting circuit is related to the specific type of the main amplifying circuit, and when the circuits of the main amplifying circuit are different, the specific circuit structure of the amplification factor adjusting circuit is correspondingly changed. In one embodiment, the main amplifier circuit is a main operational amplifier U1, and the amplification adjustment circuit is an amplification adjustment circuit for adjusting the amplification of the operational amplifier U1. It should be understood that the operational amplifier U1 is a conventional operational amplifier device.
The DA conversion circuit may be a conventional DA converter for converting a digital quantity signal into an analog quantity signal. The signal type selection switch S1 is a conventional manual selection switch, and has two fixed terminals and a movable terminal, and can implement a gate connection between one of the fixed terminals and the movable terminal.
The signal input end of the DA conversion circuit is used for inputting a digital quantity signal to be processed, the signal output end of the DA conversion circuit is connected with the first fixed end of the signal type selection switch S1, and the second fixed end of the signal type selection switch S1 is used for inputting an analog quantity signal to be processed. If the electric signal to be processed is a digital quantity signal, the first fixed end of the operation signal type selection switch S1 is in gating connection with the movable end, and the digital quantity signal is converted into an analog quantity signal through the DA conversion circuit; if the electrical signal to be processed is an analog signal, the second fixed end of the operation signal type selection switch S1 is gated with the moving end, and the analog signal is directly outputted backward.
The movable end of the signal type selection switch S1 is connected with the signal input end of the main amplification circuit, the amplification factor adjusting circuit is connected with the amplification factor adjusting end of the main amplification circuit, and the signal output end of the main amplification circuit is used for outputting the processed electric signal. Since the main amplifying circuit is the main operational amplifier U1, the non-inverting input terminal of the main operational amplifier U1 is the signal input terminal of the main amplifying circuit, the inverting input terminal and the signal output terminal of the main operational amplifier U1 are the amplification factor adjusting terminals of the main amplifying circuit, and the signal output terminal of the main operational amplifier U1 is the signal output terminal of the main amplifying circuit.
As shown in fig. 1, the amplification factor adjusting circuit includes a first resistor R1 and at least two resistor branches, where the resistance of the first resistor R1 is set to Rm, and the specific value of Rm is set according to actual needs. The number of the resistance branches is set according to actual needs. One end of the first resistor R1 is grounded, the other end of the first resistor R1 is connected to the inverting input terminal of the main operational amplifier U1 and one end of each resistor branch, and the other end of each resistor branch is connected to the signal output terminal of the main operational amplifier U1. For any one resistance branch, a second resistor R2 and a switch S2 are arranged in series. It should be understood that the resistance of each second resistor R2 is set according to actual needs, the resistance of each second resistor R2 can be the same, and then each second resistor R2 is a resistor with a fixed resistance. Further, in order to adjust the resistance of each second resistor R2, and further adjust the amplification factor more flexibly, each second resistor R2 may be an adjustable resistor, that is, a variable resistor whose resistance can be adjusted. The switch S2 is a conventional manually operated switch having two states, on and off.
Therefore, the resistance branches are arranged in parallel, for any one resistance branch, the fling-cut switch S2 is turned on, the corresponding second resistor R2 is turned on, the fling-cut switch S2 is turned off, and the corresponding second resistor R2 is withdrawn. And setting the resistance values of the equivalent resistors of all the input resistor branches as Rn, and enabling the resistance value Rn of the equivalent resistor to be correspondingly changed by inputting different second resistors R2.
The amplification factor, i.e., gain factor a, of the main operational amplifier U1 is:
different numbers of resistor branches are put into the circuit, the resistance Rn of the equivalent resistors of all the resistor branches will be different, the gain multiple A is different, and then the corresponding resistor branches can be put into the circuit according to the actual amplification requirement. The specific circuit structures of the main operational amplifier U1 and the amplification factor adjusting circuit can reliably and flexibly adjust the amplification factor according to actual needs, and compared with the existing related amplification circuit, the reliability is higher.
In this embodiment, the electric signal processing circuit further includes a backup amplification circuit, a first backup selection switch T1, a second backup selection switch T2, and a third backup selection switch T3. The spare amplifier circuit is a spare operational amplifier U2, and the spare operational amplifier U2 may be the same device as the main operational amplifier U1. The first standby selector switch T1, the second standby selector switch T2, and the third standby selector switch T3 are all conventional manual selector switches, and have two stationary terminals and one movable terminal, which can realize the gate connection between one of the stationary terminals and the movable terminal, in the same way as the signal type selector switch S1.
As shown in fig. 1, the output terminal of the signal type selection switch S1 is connected to the active terminal of the first spare selection switch T1, the first inactive terminal of the first spare selection switch T1 is connected to the non-inverting input terminal of the main operational amplifier U1, and the second inactive terminal of the first spare selection switch T1 is connected to the non-inverting input terminal of the spare operational amplifier U2. The other end of the first resistor R1 (i.e., the non-grounded end of the first resistor R1) is connected to the active end of the second spare selector switch T2, the first inactive end of the second spare selector switch T2 is connected to the inverting input terminal of the main operational amplifier U1, and the second inactive end of the second spare selector switch T2 is connected to the inverting input terminal of the spare operational amplifier U2. The other end of each resistor branch (i.e. the end of each resistor branch not connected with the first resistor R1) is connected with the active end of the third standby selection switch T3, the first inactive end of the third standby selection switch T3 is connected with the signal output end of the main operational amplifier U1, and the second inactive end of the third standby selection switch T3 is connected with the signal output end of the standby operational amplifier U2. The signal output terminal of the standby operational amplifier U2 is used for outputting the processed electrical signal.
Therefore, when the main operational amplifier U1 fails, the spare operational amplifier U2 can be used as a spare operational amplifier, and the main operational amplifier U1 can be withdrawn and the spare operational amplifier U2 can be put in by the first spare selection switch T1, the second spare selection switch T2 and the third spare selection switch T3, so that the signal amplification process can be continued, and the reliability of the electric signal processing circuit can be improved. Specifically, the method comprises the following steps: when the main operational amplifier U1 is normal, the movable end of the first standby selection switch T1 is in gating connection with the first immovable end, the movable end of the second standby selection switch T2 is in gating connection with the first immovable end, the movable end of the third standby selection switch T3 is in gating connection with the first immovable end, the main operational amplifier U1 is switched in, and the standby operational amplifier U2 is quitted; when the main operational amplifier U1 has a fault, the movable end of the first standby selection switch T1 is in gating connection with the second immovable end, the movable end of the second standby selection switch T2 is in gating connection with the second immovable end, the movable end of the third standby selection switch T3 is in gating connection with the second immovable end, exits from the main operational amplifier U1, and is switched into the standby operational amplifier U2.
It should be understood that the DA conversion circuit, the main operational amplifier U1 and the standby operational amplifier U2 are powered by conventional means and will not be described in detail.
In this embodiment, the electrical signal processing circuit further includes a fourth spare selector switch T4 and a filter circuit. The fourth spare selector switch T4 is a conventional manual selector switch, and has two fixed terminals and one movable terminal, which can be connected to each other by gating, in a similar manner to the signal type selector switch S1. The filter circuit is a conventional electric signal filter circuit and is used for filtering clutter in the electric signal. As shown in fig. 1, the signal output terminal of the main operational amplifier U1 is connected to the first fixed terminal of the fourth spare selection switch T4, the signal output terminal of the spare operational amplifier U2 is connected to the second fixed terminal of the fourth spare selection switch T4, the movable terminal of the fourth spare selection switch T4 is connected to the signal input terminal of the filter circuit, and the signal output terminal of the filter circuit is configured to output the filtered electrical signal. When the main operational amplifier U1 is turned on, the first dead end of the fourth backup selection switch T4 is gated to the active end, and when the backup operational amplifier U2 is turned on, the second dead end of the fourth backup selection switch T4 is gated to the active end. And a filter circuit is added to amplify the electric signal and then filter the electric signal, so that the stability of the electric signal is improved.
Claims (5)
1. An electrical signal processing circuit, comprising: the device comprises a main amplifying circuit, an amplification factor adjusting circuit, a DA (digital-to-analog) conversion circuit and a signal type selection switch;
the signal input end of the DA conversion circuit is used for inputting a digital quantity signal to be processed, the signal output end of the DA conversion circuit is connected with the first fixed end of the signal type selection switch, the second fixed end of the signal type selection switch is used for inputting an analog quantity signal to be processed, the movable end of the signal type selection switch is connected with the signal input end of the main amplification circuit, the amplification factor adjusting circuit is connected with the amplification factor adjusting end of the main amplification circuit, and the signal output end of the main amplification circuit is used for outputting the processed electric signal.
2. The electrical signal processing circuit of claim 1, wherein the main amplifying circuit is a main operational amplifier, the non-inverting input terminal of the main operational amplifier is the signal input terminal of the main amplifying circuit, the inverting input terminal and the signal output terminal of the main operational amplifier are the amplification adjustment terminal of the main amplifying circuit, and the signal output terminal of the main operational amplifier is the signal output terminal of the main amplifying circuit;
the amplification factor adjusting circuit comprises a first resistor and at least two resistor branches, one end of the first resistor is grounded, the other end of the first resistor is connected with the inverting input end of the main operational amplifier and one end of each resistor branch, the other end of each resistor branch is connected with the signal output end of the main operational amplifier, and a second resistor and a switching switch are connected in series in each resistor branch.
3. The electrical signal processing circuit of claim 2, wherein the second resistance is an adjustable resistor.
4. The electrical signal processing circuit of claim 2, further comprising a backup amplification circuit, a first backup selection switch, a second backup selection switch, and a third backup selection switch, the backup amplification circuit being a backup operational amplifier;
the output end of the signal type selection switch is connected with the movable end of the first standby selection switch, the first immovable end of the first standby selection switch is connected with the non-inverting input end of the main operational amplifier, and the second immovable end of the first standby selection switch is connected with the non-inverting input end of the standby operational amplifier;
the other end of the first resistor is connected with the movable end of the second standby selection switch, the first immovable end of the second standby selection switch is connected with the inverting input end of the main operational amplifier, and the second immovable end of the second standby selection switch is connected with the inverting input end of the standby operational amplifier;
the other end of each resistance branch is connected with the movable end of the third standby selection switch, the first immovable end of the third standby selection switch is connected with the signal output end of the main operational amplifier, and the second immovable end of the third standby selection switch is connected with the signal output end of the standby operational amplifier; and the signal output end of the standby operational amplifier is used for outputting the processed electric signal.
5. The electrical signal processing circuit according to claim 4, further comprising a fourth spare selection switch and a filter circuit, wherein the signal output terminal of the main operational amplifier is connected to the first fixed terminal of the fourth spare selection switch, the signal output terminal of the spare operational amplifier is connected to the second fixed terminal of the fourth spare selection switch, and the movable terminal of the fourth spare selection switch is connected to the signal input terminal of the filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120651578.9U CN214315242U (en) | 2021-03-31 | 2021-03-31 | Electric signal processing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120651578.9U CN214315242U (en) | 2021-03-31 | 2021-03-31 | Electric signal processing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214315242U true CN214315242U (en) | 2021-09-28 |
Family
ID=77837613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120651578.9U Expired - Fee Related CN214315242U (en) | 2021-03-31 | 2021-03-31 | Electric signal processing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214315242U (en) |
-
2021
- 2021-03-31 CN CN202120651578.9U patent/CN214315242U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5289191A (en) | Bipolar analog-to-digital conversion apparatus with unipolar current and voltage modes | |
| US3939435A (en) | Power amplifier | |
| KR101087629B1 (en) | Multi-band power amplifier | |
| CN214315242U (en) | Electric signal processing circuit | |
| US5973566A (en) | Discrete step variable gain inverting amplifier with constant ratio between adjacent gains | |
| DE2143030A1 (en) | Protective device for loudspeakers | |
| CN213457701U (en) | Novel APD array circuit that steps up | |
| US6819175B2 (en) | Feed forward amplifying circuit | |
| US4724365A (en) | Control circuit for direct current brushless motors | |
| CN102647163A (en) | Variable gain amplifier circuit | |
| US1396745A (en) | Vacuum-tube circuits | |
| SE414444B (en) | ELECTRONIC NETWORK FOR A PHONE FOR CONNECTING A MICROPHONE, A HORT PHONE AND A LINE-FITTED TONE GENERATOR TO A LINE-FITTED PHONE LINE | |
| EP0078347A1 (en) | Telecommunication line high-efficiency operational amplifier | |
| US7098733B1 (en) | Methods and circuits for selectable gain amplification by subtracting gains | |
| CN209879494U (en) | Multi-channel data operation acquisition device | |
| KR101762923B1 (en) | Audio equipment and audio output port | |
| CN1874160B (en) | Equipment for converting and insulating analog signals | |
| JP2000101392A (en) | Multi-input buffer amplifier and circuit using this | |
| CN213661576U (en) | Temperature drift suppression circuit | |
| CN111900941A (en) | Amplifier with a high-frequency amplifier | |
| CN213094163U (en) | Power amplifier circuit | |
| US3541260A (en) | Audio mixing system | |
| KR100690722B1 (en) | Keypad circuit for mobile communication device | |
| CN101958715A (en) | Audio digital-to-analog converter | |
| CN114844479A (en) | Capacitive programmable amplifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210928 |