Incremental integrator and the resulting servosensors
First Claim
1. Incremental output integrator comprising:
- an analog summing integrator amplifier comprising an input intended to be connected to a generator delivering a current I1 representing a magnitude to be measured;
a capacitance connected to the second input of the summing amplifier by a controllable inverter having two control terminals;
a voltage generator connected to the terminals of said capacitance by a double load switch;
a control circuit of said inverter comprising at least a high and low level detector of the output voltage of the summing integrator and means to transmit a control signal to one or other of the control terminals of the inverter depending on whether the level detected is a high level or a low level;
two output terminals connected to the control terminals of the inverter, anda circuit controlling one or the other side of the double load switch when the output voltage of the summing integrator reaches one or other of the two levels, and then to turn the double load switch off at the end of a time equal at least to the capacitor discharge time.
1 Assignment
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Accused Products
Abstract
Precision incremental-output integrator of the type comprising: an operational amplifier mounted as analog summing integrator, which sums currents I1 and I2 at the integrator input, characterized by the fact that current I2 is obtained by the discharge of a capacitor C2 and that the symmetrical reference voltage generator (Vr-), (Vr+) is replaced by a simple voltage generator (Vr) and incremental-output servosensors resulting from utilization of the said precision incremental-output integrator in which the measured magnitude, originally electrical, becomes a physical magnitude, evidenced by an electromechanical force generator by the fact that the analog amplifier of the precision incremental-output integrator (terminals A-S, FIG. 2) is replaced by the force generator of the servosensor (FIG. 3), the return current of which is current I2 discharged from capacitor C2.
10 Citations
10 Claims
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1. Incremental output integrator comprising:
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an analog summing integrator amplifier comprising an input intended to be connected to a generator delivering a current I1 representing a magnitude to be measured; a capacitance connected to the second input of the summing amplifier by a controllable inverter having two control terminals; a voltage generator connected to the terminals of said capacitance by a double load switch; a control circuit of said inverter comprising at least a high and low level detector of the output voltage of the summing integrator and means to transmit a control signal to one or other of the control terminals of the inverter depending on whether the level detected is a high level or a low level; two output terminals connected to the control terminals of the inverter, and a circuit controlling one or the other side of the double load switch when the output voltage of the summing integrator reaches one or other of the two levels, and then to turn the double load switch off at the end of a time equal at least to the capacitor discharge time. - View Dependent Claims (2)
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3. Incremental output servosensor comprising:
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a capacitance fed by a voltage generator and a double load switch; a sensor connected to the terminals of the capacitance by a controllable inverter having two control terminals; a shift detector connected to the sensor output; a control circuit of said inverter comprising at least a high low level detector of the output voltage of the shift detector and means to transmit a control signal to one or other of the control terminals of the inverter, depending on whether the level detected is of a high level or a low level; two output terminals connected to the control terminals of the inverter, and a circuit controlling one or the other side of the double load switch on when the output voltage of the summing integrator reaches one or other of said levels and then to turn the double load switch off at the end of a time at least equal to the capacitance discharge time. - View Dependent Claims (4, 5, 6)
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7. An incremental output integrator of the type which performs an analog summing integration of the currents I1 and I2 at an integration point, which adjusts the value of the integrated sum signal at said integration point to hold said signal in a predetermined range of values and which includes means for feeding back said sum signal to control one of said two currents I1 and I2, the improvement comprising a simple uni-directional voltage generator, a capacitor, capacitor charging switch means interconnecting said voltage generator to said capacitor to selectively charge said capacitor, dual capacitor discharging switch means selectively operated by said feedback means to control the sign of said one of said two currents I1 and I2 fed from said capacitor to said integration point, and said feedback means controlling said capacitor charging and discharging switch means so that said one of said two currents I1 and I2 is fed from said capacitor via one of said dual discharge switches to said integration point at times in amounts and of a sign necessary to sum with said other of said currents I1 and I2 so that the sum of the two currents I1 and I2 is within said predetermined range.
- 10. An incremental output servosensor including the integrator of claim 10 or 11, wherein one of said currents I1 and I2 is representative of a physical magnitude to be measured, and transducer means in said feedback means for transforming said physical magnitude into said one of said currents I1 and I2.
Specification