Patent EP0729228A1 successfully refreshed from Google Patents.
EP0729228A1
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Basic cell for programmable analog time continuous filter
Assignee: STMicroelectronics SRL
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Filing: 1995-02-22
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Granted: —
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Expires: 2015-02-22
Abstract
Abstract An elementary cell structure for programmable time-continuous analog filters and in particular for the processing of analog signals in read/write operations on magnetic supports comprises an amplifier stage (3) provided with a pair of structurally identical transconductance half-cells (2,2') connected together in a common circuit node (X). With a cascade of cells of this type is provided a time-continuous analog delay line which is used in a transverse time-continuous analog filter. This filter comprises a cascade of identical delay lines (LR) connected through multiplier nodes (5) to a final summation node (6).
Inventors
- 👤 Roberto Alini
- 👤 Francesco Brianti
- 👤 Valerio Pisati
- 👤 Marco Demicheli
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 20:33
CPC Classifications
H; H03; H03H; H03H15/00; H03H11/00; H03H11/02; H03H11/04; H03H11/0422
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
95 words
Elementary cell structure for programmable time-continuous analog filters and in particular for the processing of analog signals in read/write operations on magnetic supports of the type including an amplifier stage inserted between a first reference supply voltage (Vcc) and a second reference voltage (GND) and having at least one input terminal (I) and at least one output terminal (OUT) and characterised in that said amplifier stage comprises a pair of structurally identical half-cells (2,2') with each provided with a transconductance amplifier stage (3) and connected to the other half-cell through a common circuit node (X).
Claim 2
Dependent Claim
95 words
Elementary cell structure for programmable time-continuous analog filters and in particular for the processing of analog signals in read/write operations on magnetic supports of the type including an amplifier stage inserted between a first reference supply voltage (Vcc) and a second reference voltage (GND) and having at least one input terminal (I) and at least one output terminal (OUT) and characterised in that said amplifier stage comprises a pair of structurally identical half-cells (2,2') with each provided with a transconductance amplifier stage (3) and connected to the other half-cell through a common circuit node (X).
Claim 3
Dependent Claim
18 words
Time-continuous analog delay line characterised in that it comprises a cascade of cells in accordance with claim 1.
Claim 4
Dependent Claim
19 words
Transverse time-continuous analog filter characterised in that it comprises at least one delay line in accordance with claim 2.
Claim 5
Dependent Claim
29 words
Filter in accordance with claim 3 characterised in that it comprises a cascade of identical delay lines (LR) connected through multiplier nodes (5) to a final summation node (6).
Claim 6
Dependent Claim
31 words
Elementary cell structure for analog filters in accordance with claim 1 characterised in that each half-cell (2,2') comprises at least one pair of type NPN or type PNP bipolar transistors (T1,T2).
Claim 7
Dependent Claim
28 words
Elementary cell structure for analog filters in accordance with claim 1 characterised in that each half-cell (2,2') comprises at least one pair of field-effect or MOS transistors (M1,M2).
Claim 8
Dependent Claim
112 words
Elementary cell structure for programmable time-continuous analog filters and in particular for the processing of analog signals in read/write operations on magnetic supports and of the type including an amplifier stage inserted between a first reference supply voltage (Vcc) and a second reference voltage (GND) and having at least one input terminal (IN) and at least one output terminal (OUT) and characterised in that it comprises an input stage (8) provided by means of a pair of structurally identical half-stages (10,10') and an output stage (9) provided with a pair of structurally identical half-stages (12,12') with each of said half-stages (10,10';12,12') connected to its twin half-stage through a common circuit node (X1,X2,X3).
Claim 9
Dependent Claim
112 words
Elementary cell structure for programmable time-continuous analog filters and in particular for the processing of analog signals in read/write operations on magnetic supports and of the type including an amplifier stage inserted between a first reference supply voltage (Vcc) and a second reference voltage (GND) and having at least one input terminal (IN) and at least one output terminal (OUT) and characterised in that it comprises an input stage (8) provided by means of a pair of structurally identical half-stages (10,10') and an output stage (9) provided with a pair of structurally identical half-stages (12,12') with each of said half-stages (10,10';12,12') connected to its twin half-stage through a common circuit node (X1,X2,X3).
Claim 10
Dependent Claim
18 words
Time-continuous analog delay line characterised in that it comprises a cascade of cells in accordance with claim 8.
Claim 11
Dependent Claim
19 words
Transverse time-continuous analog filter characterised in that it comprises at least one delay line in accordance with claim 8.
References Cited (Backward Citations)
EP0260785A2
Cited
DE3939906A1
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