JPS57113178A - Arithmetic circuit - Google Patents
Arithmetic circuitInfo
- Publication number
- JPS57113178A JPS57113178A JP18812080A JP18812080A JPS57113178A JP S57113178 A JPS57113178 A JP S57113178A JP 18812080 A JP18812080 A JP 18812080A JP 18812080 A JP18812080 A JP 18812080A JP S57113178 A JPS57113178 A JP S57113178A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- input terminal
- trs
- operational amplifier
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06G—ANALOGUE COMPUTERS
- G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
- G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
- G06G7/18—Arrangements for performing computing operations, e.g. operational amplifiers for integration or differentiation; for forming integrals
- G06G7/184—Arrangements for performing computing operations, e.g. operational amplifiers for integration or differentiation; for forming integrals using capacitive elements
- G06G7/186—Arrangements for performing computing operations, e.g. operational amplifiers for integration or differentiation; for forming integrals using capacitive elements using an operational amplifier comprising a capacitor or a resistor in the feedback loop
- G06G7/1865—Arrangements for performing computing operations, e.g. operational amplifiers for integration or differentiation; for forming integrals using capacitive elements using an operational amplifier comprising a capacitor or a resistor in the feedback loop with initial condition setting
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Power Engineering (AREA)
- Software Systems (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Filters That Use Time-Delay Elements (AREA)
- Amplifiers (AREA)
Abstract
PURPOSE:To solve the problem of the accumulation of fixed charge which occurs when only a capacitor is connected to the input terminal of an MOS operational amplifier, by connecting a switched capacitor between the output terminal and input terminal of an operational amplifier. CONSTITUTION:An operation amplifier 101 with MOS structure and capacitors 102 and 103 integrated in the same chip with said amplifier are provided, and the output terminal 106 of the operational amplifier 101 of an arithmetic circuit whose arithmetic coefficient is determined by the capacity ratio of said capacitors, and one input terminal 105, a switched capacitor consisting of a switch and a capacitor is connected. For example, the out-of-phase amplifying circuit in a figure is provided with MOS transistor TRs 202 and 203 operating as switches, and an integrated capacitor 201 as a discharging means for fixed charge, and out-of-phase clock signals are inputted to the gates of the TRs 202 and 203 to make a switched capacitor, consisting of the capacitor 201 and the TRs 202 and 203, operates equivalently to a resistance.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18812080A JPS57113178A (en) | 1980-12-29 | 1980-12-29 | Arithmetic circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18812080A JPS57113178A (en) | 1980-12-29 | 1980-12-29 | Arithmetic circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57113178A true JPS57113178A (en) | 1982-07-14 |
JPH0157833B2 JPH0157833B2 (en) | 1989-12-07 |
Family
ID=16218053
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18812080A Granted JPS57113178A (en) | 1980-12-29 | 1980-12-29 | Arithmetic circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57113178A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01132134U (en) * | 1988-03-01 | 1989-09-07 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5659368A (en) * | 1979-10-17 | 1981-05-22 | Fujitsu Ltd | Switched capacitor integrator |
-
1980
- 1980-12-29 JP JP18812080A patent/JPS57113178A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5659368A (en) * | 1979-10-17 | 1981-05-22 | Fujitsu Ltd | Switched capacitor integrator |
Also Published As
Publication number | Publication date |
---|---|
JPH0157833B2 (en) | 1989-12-07 |
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