GB1307528A - Gain control of electronic amplifier arrangements - Google Patents

Gain control of electronic amplifier arrangements

Info

Publication number
GB1307528A
GB1307528A GB1307528DA GB1307528A GB 1307528 A GB1307528 A GB 1307528A GB 1307528D A GB1307528D A GB 1307528DA GB 1307528 A GB1307528 A GB 1307528A
Authority
GB
United Kingdom
Prior art keywords
amplifier
gain
closed loop
input
high frequency
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
Application number
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Howe Richardson Scale Co Inc
Original Assignee
Howe Richardson Scale Co Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Howe Richardson Scale Co Inc filed Critical Howe Richardson Scale Co Inc
Publication of GB1307528A publication Critical patent/GB1307528A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/02—Manually-operated control
    • H03G3/04—Manually-operated control in untuned amplifiers
    • H03G3/10—Manually-operated control in untuned amplifiers having semiconductor devices
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/44—Polyester-amides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/48—Polymers modified by chemical after-treatment
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/02—Manually-operated control
    • H03G5/04—Manually-operated control in untuned amplifiers
    • H03G5/10—Manually-operated control in untuned amplifiers having semiconductor devices
    • H03G5/12—Manually-operated control in untuned amplifiers having semiconductor devices incorporating negative feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/12—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices
    • H03G9/14—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices for gain control and tone control
    • H03G9/16—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices for gain control and tone control incorporating negative feedback

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Macromonomer-Based Addition Polymer (AREA)
  • Amplifiers (AREA)

Abstract

1307528 Control of amplifier gain and frequency response HOWE RICHARDSON SCALE CO Ltd 4 June 1970 [5 June 1969] 28452/69 Heading H3T In an electronic amplifier having two amplifiers A1, A2 connected in series and interconnected by passive components, a first tuned adjustable resistor-fixed capacitor circuit RV1, C1 is connected to the input of the first amplifier A1 to independently control the low frequency gain, a second tuned adjustable resistor-fixed capacitor circuit RV2, C2, C3 is connected in a feedback path about the first amplifier A1 to independently control the high frequency gain, an adjustable resistor RV3 is connected between the output of the first amplifier A1 and the input of the second amplifier A2 to independently control the overall gain and a third tuned fixed resistor-fixed capacitor R1, C4 is connected in a feedback path about the second amplifier A2 to set a high frequency cut-off for the amplifier. The FET input stage TR1, TR2 ensures that the controller is centred about zero. A relay MAN/1 may be operated and the closed loop gain about the amplifier A1 is made constant so that the low and high frequency gains can be reduced to zero. This constant closed loop gain is equal to R3/R2. The amplifier may be manually operated by using input pin H so as to by-pass amplifier A1. The components of the amplifier may be mounted on a printed circuit board. The amplifier may be used in closed loop zero error sealing systems for controlling automatic weighing apparatus.
GB1307528D 1969-06-05 1969-06-05 Gain control of electronic amplifier arrangements Expired GB1307528A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2845769A GB1281752A (en) 1969-06-05 1969-06-05 Unsaturated polyesteramides and their production

Publications (1)

Publication Number Publication Date
GB1307528A true GB1307528A (en) 1973-02-21

Family

ID=10275935

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1307528D Expired GB1307528A (en) 1969-06-05 1969-06-05 Gain control of electronic amplifier arrangements
GB2845769A Expired GB1281752A (en) 1969-06-05 1969-06-05 Unsaturated polyesteramides and their production

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB2845769A Expired GB1281752A (en) 1969-06-05 1969-06-05 Unsaturated polyesteramides and their production

Country Status (1)

Country Link
GB (2) GB1307528A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4426491A (en) * 1980-06-23 1984-01-17 Union Carbide Corporation Curable physical mixtures and composites therefrom
JP5107908B2 (en) * 2005-06-16 2012-12-26 ダウ グローバル テクノロジーズ エルエルシー Aliphatic polyesteramide composition and process for producing the same

Also Published As

Publication number Publication date
GB1281752A (en) 1972-07-12

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees