Calibrating impulse generator for an impulse-shaping element
AssigneeSiemens Aktiengesellschaft
InventorEstan Laurent
Life of this patent
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Abstract
A calibrating impulse generator which is connectable to the input of a signal-shaping element, the latter of which reshapes the input signal in comformance with the function ##EQU1## The calibrating impulse generator is constructed, whereby a calibrating impulse proceeds over a period of time from an initial value in accordance with an e-function to a final value, and after reaching the final value return again to its initial value. Calibrating impulses with the described sequence will produce rectangular or square-wave impulses of known amplitude at the output of the signal-shaping element.
Claims3
A calibrating impulse generator including a signal-shaping element having an input for receiving an input signal f(t) and being operative for reshaping the input signal pursuant to a function represented by the quotient of the derivative with respect to time of the input signal, and the input signal, the quotient thus being expressed:
- ##EQU8## the improvement comprising said calibrating inpulse generator having a calibrating impulse generating circuit with an output connected to the input of said signal-shaping element, said calibrating impulse generating circuit having a construction for supplying a calibrating impulse to said output which proceeds from an initial value pursuant to an e-function over a period of time to a final value and after reaching the final value returns again to its initial value, said calibrating impulse returning from said final value to its initial value pursuant to an e-function which is a mirror-image to the e-function pursuant to which said signal proceeds from its initial value to its final value.
A calibrating impulse generator including a signal-shaping element having an input for receiving an input signal f(t), said element reshaping the input signal at the input thereof pursuant to the function ##EQU9## the improvement comprising:
- said calibrating impulse generator having an impulse generating circuit connected to said input of said element and said circuit being of a construction so that a calibrating impulse proceeds from an initial value pursuant to an e-function over a period of time to a final value and after reaching the final value returns again to its initial value, said impulse generating circuit comprising a capacitance for producing said e-function;
- and means for charging and discharging said capacitance, and said circuit further comprising an ohmic charging resistor being connected to said capacitance at which the calibrating impulses are branched off;
- an operational amplifier, said capacitance being connected in series with said ohmic resistor to a first input of said operational amplifier and with one pole connected to ground;
- a plurality of equally-sized coupling resistors being connected between the output and two inputs of said operational amplifier;
- a first calibrating switch being connected between the first input of said operational amplifier and ground;
- and a second calibrating switch and one said coupling resistor forming a series circuit between the second input of said operational amplifier and ground, said coupling resistors being twice as large as said ohmic charging resistor.
Dependencies are inferred from the claim text.