EP0303241A2
Expired / Lapsed
EP
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Track-and-hold amplifier
Assignee: Signal Processing Technologies Inc
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Filing: 1988-08-10
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Granted: —
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Expires: 2008-08-10
Abstract
Abstract A track-and-hold amplifier system comprises an added switching means (23) for adding compensatory signals to a second input of an operational amplifier (10) used in the system.
Inventors
- 👤 Alfi Moscovici
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 01:41
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/04; G; G11; G11C; G11C27/00; G11C27/02; G11C27/024; G11C27/026; H03F1/00; H03F1/30; H03F1/303
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
392 words
An amplifier system switchable between operating modes, including first and second operating modes, and having a system signal input region (18) and a system signal output region (13), characterized by: a) a signal amplifier (10) having a first input region and a second input region, each of which exhibits a relatively high circuit impedence. and having an output region (13) which exhibits a relatively low circuit impedence, said signal amplifier being capable of providing at said output region a signal in a first magnitude direction substantially similar to a signal provided at said first input region in said first magnitude direction but of a greater magnitude in said first magnitude direction, and being further capable of providing at said output region a signal in a second magnitude direction substantially similar to a signal provided at said second input region in said first magnitude direction but of a greater magnitude in said second magnitude direction: b) first, second and third switching means each having first and second terminating regions and having a control region by which it is capable of being directed to provide a conductive path between its first and second terminating regions, said first switching means (17) first terminating region being electrically connected to said signal amplifier (10) second input region (11), said second switching means (21) first terminating region being electrically connected to said signal amplifier (10) first input region (12), said third switching means (23) first terminating region being electrically connected to said first switching means (17) second terminating region, and said third switching means (23) second terminating region being electrically connected to said second switching means (21) second terminating region: c) a feedback capacitive means (14) electrically connected between said signal amplifier output region (13) and said signal amplifier second input region (11); and d) first (16), second (19) and third (20) resistive means with said first resistive means (16) electrically connected between said signal amplifier output region (13) and said first switching means (17) second terminating region, with said second resistive means (19) electrically connected between said first switching means (17) second terminating region and said amplifier system signal input region (18), and with said third resistive means (20) electrically connected between said second (21) and third (23) switching means second terminating regions and a first terminal means adapted for connection to a first voltage source (ground).
Claim 2
Dependent Claim
392 words
An amplifier system switchable between operating modes, including first and second operating modes, and having a system signal input region (18) and a system signal output region (13), characterized by: a) a signal amplifier (10) having a first input region and a second input region, each of which exhibits a relatively high circuit impedence. and having an output region (13) which exhibits a relatively low circuit impedence, said signal amplifier being capable of providing at said output region a signal in a first magnitude direction substantially similar to a signal provided at said first input region in said first magnitude direction but of a greater magnitude in said first magnitude direction, and being further capable of providing at said output region a signal in a second magnitude direction substantially similar to a signal provided at said second input region in said first magnitude direction but of a greater magnitude in said second magnitude direction: b) first, second and third switching means each having first and second terminating regions and having a control region by which it is capable of being directed to provide a conductive path between its first and second terminating regions, said first switching means (17) first terminating region being electrically connected to said signal amplifier (10) second input region (11), said second switching means (21) first terminating region being electrically connected to said signal amplifier (10) first input region (12), said third switching means (23) first terminating region being electrically connected to said first switching means (17) second terminating region, and said third switching means (23) second terminating region being electrically connected to said second switching means (21) second terminating region: c) a feedback capacitive means (14) electrically connected between said signal amplifier output region (13) and said signal amplifier second input region (11); and d) first (16), second (19) and third (20) resistive means with said first resistive means (16) electrically connected between said signal amplifier output region (13) and said first switching means (17) second terminating region, with said second resistive means (19) electrically connected between said first switching means (17) second terminating region and said amplifier system signal input region (18), and with said third resistive means (20) electrically connected between said second (21) and third (23) switching means second terminating regions and a first terminal means adapted for connection to a first voltage source (ground).
Claim 3
Dependent Claim
30 words
The amplifier system of claim 1, characterized in that said first switching means (17) control region and said second switching means (21) control region are electrically connected to one another.
Claim 4
Dependent Claim
38 words
The amplifier system of claim 1 or 2, characterized in that said first (17), second (21) and third (23) switching means are field-effect transistor means having sources and drains serving as said first and second terminating regions thereof.
Claim 5
Dependent Claim
33 words
The amplifier system of claim 1, 2, or 3, characterized by a compensation capacitive means (15) electrically connected between said signal amplifier (10) first input region (12) and said first terminal means (ground).
Claim 6
Dependent Claim
46 words
The amplifier system according to one of the preceding claims, characterized in that said third resistive means (20) has a resistance value substantially equal to that resistance value obtained if said first resistive means (16) and said second resistive means (19) were electrically connected in parallel.
Claim 7
Dependent Claim
29 words
The amplifier system according to claim 4 or 5. characterized in that said feedback capacitive means (14), and said compensation capacitive means (15) are of substantially similar capacitance values.
Claim 8
Dependent Claim
55 words
The amplifier system according to one of the preceding claims, characterized in that said signal amplifier (10) is an operational amplifier means having a non-inverting input (12) serving as said first input region thereof, an inverting input (11) serving as said second input region therof. and an output (13) serving as said output region thereof.
References Cited (Backward Citations)
No citation records indexed.
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