JPS54125085A - Automatic balancing impedance bridge circuit - Google Patents
Automatic balancing impedance bridge circuitInfo
- Publication number
- JPS54125085A JPS54125085A JP3260978A JP3260978A JPS54125085A JP S54125085 A JPS54125085 A JP S54125085A JP 3260978 A JP3260978 A JP 3260978A JP 3260978 A JP3260978 A JP 3260978A JP S54125085 A JPS54125085 A JP S54125085A
- Authority
- JP
- Japan
- Prior art keywords
- phase difference
- bridge
- difference
- output voltage
- phase
- 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
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
PURPOSE: To attain the balance of impedance bridge stably and automatically in a simple constitution, by providing a phase control circuit intended to detect the phase difference of currents flowing in two branch circuits of a bridge and control so that the phase difference be zero.
CONSTITUTION: For the input to a phase difference detection circuit 1, the outputs of two branch circuits of a bridge are applied, and the phase difference is detected. Controlling the voltage e3 with respect to the earth potential, a variable impedance 5 is controlled in a direction to decrease this phase difference. The output voltage of the two branch circuits are inputted into a differential circuit 3. This differential circuit 3 outputs the difference of the two inputs. An automatic gain control circuit 2 controls e4 by a level difference detection circuit 4 to decrease the output voltage e0, so that the gain is controlled in a direction to render the potential difference between e1 and e2 to zero. When the said operations of phase control and gain control are performed simultaneously, the output voltage e0 becomes zero, so that the bridge may be balanced.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3260978A JPS54125085A (en) | 1978-03-22 | 1978-03-22 | Automatic balancing impedance bridge circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3260978A JPS54125085A (en) | 1978-03-22 | 1978-03-22 | Automatic balancing impedance bridge circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54125085A true JPS54125085A (en) | 1979-09-28 |
JPS6256981B2 JPS6256981B2 (en) | 1987-11-28 |
Family
ID=12363587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3260978A Granted JPS54125085A (en) | 1978-03-22 | 1978-03-22 | Automatic balancing impedance bridge circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54125085A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012506057A (en) * | 2008-10-16 | 2012-03-08 | ウステル・テヒノロジーズ・アクチエンゲゼルシヤフト | Capacitance measurement circuit for yarn inspection |
-
1978
- 1978-03-22 JP JP3260978A patent/JPS54125085A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012506057A (en) * | 2008-10-16 | 2012-03-08 | ウステル・テヒノロジーズ・アクチエンゲゼルシヤフト | Capacitance measurement circuit for yarn inspection |
Also Published As
Publication number | Publication date |
---|---|
JPS6256981B2 (en) | 1987-11-28 |
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