GB1239213A - - Google Patents
Info
- Publication number
- GB1239213A GB1239213A GB1239213DA GB1239213A GB 1239213 A GB1239213 A GB 1239213A GB 1239213D A GB1239213D A GB 1239213DA GB 1239213 A GB1239213 A GB 1239213A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- july
- contacts
- closed
- capacitor
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/45—Differential amplifiers
- H03F3/45071—Differential amplifiers with semiconductor devices only
- H03F3/45479—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
- H03F1/303—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters using a switching device
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
1,239,213. Transistor amplifying circuits. PLESSEY CO. Ltd. 12 July, 1968 [12 July, 1967], No. 31982/67. Headings H3T. A differential amplifier is operatively associated with a plurality of static switching devices which are operated sequentially for drift correction purposes. In Fig. 2, during the correction period when contacts S1 are open and contacts S2 are closed, capacitor C charges up to a voltage of approximately V REF +Ve, where Ve is the off-set voltage existing at that time. During the active period, S2 open and S1 closed, the voltage at V z equals A v (VS1-VS2), where AV is the gain. Thus the variable offset voltage Ve has no effect. As offset drift rates are low and capacitor time constants are high, the amplifier can perform for a relatively long time before a correction period is required. Switches S1 and S2 can be of any required static type, Fig. 3, showing the circuit in integrated circuit form using MOST's.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3198267 | 1967-07-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1239213A true GB1239213A (en) | 1971-07-14 |
Family
ID=10331278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1239213D Expired GB1239213A (en) | 1967-07-12 | 1967-07-12 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1239213A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3967208A (en) * | 1974-01-25 | 1976-06-29 | Commissariat A L'energie Atomique | Amplifying integrated circuit in the MOS technology |
| US3984780A (en) * | 1974-09-11 | 1976-10-05 | Motorola, Inc. | CMOS voltage controlled current source |
| US4048575A (en) * | 1974-09-11 | 1977-09-13 | Motorola, Inc. | Operational amplifier |
| FR2412196A1 (en) * | 1977-12-19 | 1979-07-13 | Intersil Inc | ACTIVE ANALOGUE SIGNAL PROCESSING SYSTEM |
| EP0243792A1 (en) * | 1986-04-30 | 1987-11-04 | International Business Machines Corporation | Offset corrected amplifier |
| EP0420858A1 (en) * | 1988-04-15 | 1991-04-10 | Andros Analyzers Inc | An improved set point control circuit for an infrared gas analyzer. |
-
1967
- 1967-07-12 GB GB1239213D patent/GB1239213A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3967208A (en) * | 1974-01-25 | 1976-06-29 | Commissariat A L'energie Atomique | Amplifying integrated circuit in the MOS technology |
| US3984780A (en) * | 1974-09-11 | 1976-10-05 | Motorola, Inc. | CMOS voltage controlled current source |
| US4048575A (en) * | 1974-09-11 | 1977-09-13 | Motorola, Inc. | Operational amplifier |
| FR2412196A1 (en) * | 1977-12-19 | 1979-07-13 | Intersil Inc | ACTIVE ANALOGUE SIGNAL PROCESSING SYSTEM |
| EP0243792A1 (en) * | 1986-04-30 | 1987-11-04 | International Business Machines Corporation | Offset corrected amplifier |
| EP0420858A1 (en) * | 1988-04-15 | 1991-04-10 | Andros Analyzers Inc | An improved set point control circuit for an infrared gas analyzer. |
| EP0420858A4 (en) * | 1988-04-15 | 1991-12-04 | Andros Analyzers Incorporated | An improved set point control circuit for an infrared gas analyzer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |