US3568044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linearizing circuit for high output transducers
Assignee: IMO Industries Inc
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Filing: 1968-09-12
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Granted: 1971-03-02
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Expires: 1988-09-12
Abstract
Abstract A transducer system which employs in combination an impedance bridge circuit with a differential amplifier and includes a feedback circuit to equalize nonlinearity in the components of the impedance bridge.
Inventors
- 👤 Shmuel Elazar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:56
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/16; G01K7/18; G01K7/20; G01K7/21; G01L; G01L1/00; G01L1/20; G01L1/22; G01L1/2268; G01L1/2275; H; H03; H03H; H03H3/00; H03H3/007; H03H3/02; H03H3/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
115 words
In a transducer system in which a bridge is energized by a source of excitation voltage, the combination comprising: an impedance bridge network having a pair of excitation input terminals adapted to be connected to the source of excitation voltage, the bridge network including at least one active bridge element and being arranged to produce an output representative of the bridge unbalance in response to applied stimulation; an amplifier coupled to the bridge network for producing an output signal representative of the bridge output; and means responsive to the output signal of the amplifier for applying a voltage to the bridge network to compensate for nonlinear response of the active bridge elements to applied stimulation.
Claim 2
Dependent Claim
115 words
In a transducer system in which a bridge is energized by a source of excitation voltage, the combination comprising: an impedance bridge network having a pair of excitation input terminals adapted to be connected to the source of excitation voltage, the bridge network including at least one active bridge element and being arranged to produce an output representative of the bridge unbalance in response to applied stimulation; an amplifier coupled to the bridge network for producing an output signal representative of the bridge output; and means responsive to the output signal of the amplifier for applying a voltage to the bridge network to compensate for nonlinear response of the active bridge elements to applied stimulation.
Claim 3
Dependent Claim
22 words
The transducer system as defined in claim 1 wherein said changes the magnitude of the excitation voltage applied to the bridge network.
Claim 4
Dependent Claim
36 words
The transducer system as defined in claim 2 wherein said amplifier is a differential amplifier and said means includes a feedback resistance coupled between the amplifier and one of the input terminals of the bridge network.
Claim 5
Dependent Claim
28 words
The transducer system as defined in claim 3 further including a resistance connected between the source of excitation voltage and said one input terminal of the bridge network.
Claim 6
Dependent Claim
165 words
A transducer system comprising: a voltage source; a bridge network including a first pair of resistors and a second pair of resistors, at least one of said resistors being variable in response to applied stimulation; first and second terminals; means for connecting the first pair of resistors in series between the first and second terminals, and means for connecting the second pair of resistors in series between the first and second terminals; means for connecting the voltage source across the first and second terminals; a differential amplifier having a pair of input and a pair of output terminals; means for connecting one of the amplifier input terminals to the junction of the first pair of resistors; means for connecting the other amplifier input terminal to the junction of the second pair of resistors; and feedback means for reducing nonlinearity of the variable resistor response to applied stimulation, connected between one of the outputs of the differential amplifier and the first terminal of the bridge network.
Claim 7
Dependent Claim
165 words
A transducer system comprising: a voltage source; a bridge network including a first pair of resistors and a second pair of resistors, at least one of said resistors being variable in response to applied stimulation; first and second terminals; means for connecting the first pair of resistors in series between the first and second terminals, and means for connecting the second pair of resistors in series between the first and second terminals; means for connecting the voltage source across the first and second terminals; a differential amplifier having a pair of input and a pair of output terminals; means for connecting one of the amplifier input terminals to the junction of the first pair of resistors; means for connecting the other amplifier input terminal to the junction of the second pair of resistors; and feedback means for reducing nonlinearity of the variable resistor response to applied stimulation, connected between one of the outputs of the differential amplifier and the first terminal of the bridge network.
Claim 8
Dependent Claim
43 words
The transducer as defined in claim 5 wherein the means for connecting the voltage source across the first and second terminals includes a resistor connected between the first terminal of the bridge network and one of the output circuits of said voltage source.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |