JPS5577210A - Detection circuit for differential amplifier - Google Patents
Detection circuit for differential amplifierInfo
- Publication number
- JPS5577210A JPS5577210A JP15136878A JP15136878A JPS5577210A JP S5577210 A JPS5577210 A JP S5577210A JP 15136878 A JP15136878 A JP 15136878A JP 15136878 A JP15136878 A JP 15136878A JP S5577210 A JPS5577210 A JP S5577210A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- difference
- switch
- consequently
- amplifier
- 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.)
- Pending
Links
Landscapes
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
PURPOSE: To minimize an error caused phase variation among a residual voltage, difference signal and synchronizing signal by synchronously detecting a difference in voltage between two outputs of secondary coils of a transformer by a rectangular voltage equivalent to the half of the sum voltage and then by smoothing the extracted difference voltage.
CONSTITUTION: Difference output voltage (e1-e2) between secondary coils L1 and L2 of differential transformer 10 is amplified 11 and led to detecting analog switch 12. A value obtained by having 13 difference voltage (e1-e2) is applied one input terminal of difference amplifier 14, and voltage (-e2) at the middle point between coils L1 and L2 to the other; and voltage (e1+e2)/2 is sent from amplifier 14 to zero-cross detector 15, which applies switch 12 with a rectangular voltage of a level equivalent to the polarity of the voltage. Consequently, switch 12 is changed over to detect synchronously difference voltage (e1-e2) and a direct-current voltage smoothed by LPF16 is outputted. Consequently, an error due to phase variation among a residual voltage, difference signal and synchronizing signal can be reduced extremely.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15136878A JPS5577210A (en) | 1978-12-06 | 1978-12-06 | Detection circuit for differential amplifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15136878A JPS5577210A (en) | 1978-12-06 | 1978-12-06 | Detection circuit for differential amplifier |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5577210A true JPS5577210A (en) | 1980-06-10 |
Family
ID=15517013
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15136878A Pending JPS5577210A (en) | 1978-12-06 | 1978-12-06 | Detection circuit for differential amplifier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5577210A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50118224A (en) * | 1974-03-04 | 1975-09-16 |
-
1978
- 1978-12-06 JP JP15136878A patent/JPS5577210A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50118224A (en) * | 1974-03-04 | 1975-09-16 |
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