JPH0286219U - - Google Patents
Info
- Publication number
- JPH0286219U JPH0286219U JP16404888U JP16404888U JPH0286219U JP H0286219 U JPH0286219 U JP H0286219U JP 16404888 U JP16404888 U JP 16404888U JP 16404888 U JP16404888 U JP 16404888U JP H0286219 U JPH0286219 U JP H0286219U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- variable
- variable gain
- operational amplifier
- gain
- 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.)
- Granted
Links
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 238000009499 grossing Methods 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims 1
- 239000003990 capacitor Substances 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Description
第１図は、本考案の圧縮比可変型の圧縮回路に
係る実施例を示すブロツク図、第２図は、本考案
の圧縮比可変型の圧縮回路に係る一具体例を示す
回路図、第３図は、従来の圧縮回路を示す為の回
路図、第４図は、本考案の圧縮比可変型の圧縮回
路の入出力特性を説明する為の図である。
３：演算増幅回路、４：可変利得回路、５：整
流平滑回路、６：加算回路、７：可変電流源回路
、９，１０：基準電圧源、１２，１３：電流ミラ
ー回路。
FIG. 1 is a block diagram showing an embodiment of the variable compression ratio type compression circuit of the present invention, and FIG. 2 is a circuit diagram showing a specific example of the variable compression ratio type compression circuit of the present invention. FIG. 3 is a circuit diagram showing a conventional compression circuit, and FIG. 4 is a diagram illustrating the input/output characteristics of the variable compression ratio type compression circuit of the present invention. 3: operational amplifier circuit, 4: variable gain circuit, 5: rectifying and smoothing circuit, 6: adding circuit, 7: variable current source circuit, 9, 10: reference voltage source, 12, 13: current mirror circuit.
Claims (1)
路と、該演算増幅回路の出力信号がコンデンサを
通して得られ、該出力信号が夫々第１と第２の抵
抗を介して供給される可変利得回路と整流平滑回
路とを具え、該整流平滑回路の出力である利得制
御電流により該可変利得回路の利得が制御され、
且つ、該可変利得回路の出力が該演算増幅回路の
反転入力端子に接続されてなる圧縮回路に於いて
、該整流平滑回路から該可変利得回路に供給され
る利得制御電流に、可変電流源回路から供給され
る電流を加算して供給し、該可変利得制御回路の
利得を制御することにより、該演算増幅回路に供
給される入力信号を所望の圧縮比で出力すること
を特徴とする圧縮比可変型の圧縮回路。 an inverting amplification type operational amplifier circuit to which an input signal is input; and a variable gain circuit to which an output signal of the operational amplifier circuit is obtained through a capacitor, and the output signal is supplied through a first resistor and a second resistor, respectively. a rectifying and smoothing circuit, the gain of the variable gain circuit is controlled by a gain control current that is an output of the rectifying and smoothing circuit;
In the compression circuit in which the output of the variable gain circuit is connected to the inverting input terminal of the operational amplifier circuit, a variable current source circuit is connected to the gain control current supplied from the rectifying and smoothing circuit to the variable gain circuit. A compression ratio characterized in that the input signal supplied to the operational amplifier circuit is outputted at a desired compression ratio by adding and supplying currents supplied from the variable gain control circuit and controlling the gain of the variable gain control circuit. Variable compression circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16404888U JPH0648982Y2 (en) | 1988-12-20 | 1988-12-20 | Variable compression ratio compression circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16404888U JPH0648982Y2 (en) | 1988-12-20 | 1988-12-20 | Variable compression ratio compression circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0286219U true JPH0286219U (en) | 1990-07-09 |
| JPH0648982Y2 JPH0648982Y2 (en) | 1994-12-12 |
Family
ID=31449316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16404888U Expired - Fee Related JPH0648982Y2 (en) | 1988-12-20 | 1988-12-20 | Variable compression ratio compression circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0648982Y2 (en) |
-
1988
- 1988-12-20 JP JP16404888U patent/JPH0648982Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0648982Y2 (en) | 1994-12-12 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |