Method of measuring parameters of complex electric circuit and device for effecting same

Claim 1

A method of measuring the parameters of a complex electric circuit, comprising the steps of applying a constant voltage directly across its input in case the components thereof are connected in parallel; comparing the current flowing through the complex electric circuit in case the components thereof are connected in parallel, with two reference currents, one with the lesser value exceeding the constant component of said current; measuring the time interval between the instants said current equals said two reference currents; reversing the polarity of said constant voltage after a calibrated time interval which exceeds the value of the time component of the complex electric circuit counting from the instant said constant voltage is applied to said circuit; measuring another time interval counting from said instant of reversing the polarity of said constant voltage until the instant the current flowing through said complex electric circuit attains a value approximately equal to zero; cutting off said constant voltage supply; measuring the current flowing through the complex electric circuit, depending on whose value, in conjUnction with the two measured time intervals, the parameters of the complex electric circuit are determined.

Claim 2

A method of measuring the parameters of a complex electric circuit, comprising the steps of applying a constant voltage directly across its input in case the components thereof are connected in parallel; comparing the current flowing through the complex electric circuit in case the components thereof are connected in parallel, with two reference currents, one with the lesser value exceeding the constant component of said current; measuring the time interval between the instants said current equals said two reference currents; reversing the polarity of said constant voltage after a calibrated time interval which exceeds the value of the time component of the complex electric circuit counting from the instant said constant voltage is applied to said circuit; measuring another time interval counting from said instant of reversing the polarity of said constant voltage until the instant the current flowing through said complex electric circuit attains a value approximately equal to zero; cutting off said constant voltage supply; measuring the current flowing through the complex electric circuit, depending on whose value, in conjUnction with the two measured time intervals, the parameters of the complex electric circuit are determined.

Claim 3

A method of measuring the parameters of a complex electric circuit, comprising the steps of applying a constant voltage directly across its input in case the components thereof are connected in parallel; comparing the integral of current flowing through the complex electric circuit, in case the components thereof are connected in parallel, with two reference currents, one with the lesser value exceeding the constant component of the current integral; measuring the time interval between the instant said integral of current equals two said reference currents; reversing the polarity of said constant voltage after a calibrated time interval, which exceeds the value of the time constant of the complex electric circuit counting from the instant said constant voltage is applied to said circuit; measuring another time interval counting from said instant of reversing the polarity of said constant voltage until the instant the integral of current flowing through said complex electric circuit attains a value approximately equal to zero; cutting off said constant voltage supply; measuring the integral of current flowing through the complex electric circuit, depending on whose value, in conjunction with the two measured time intervals, the parameters of the complex electric circuit are determined.

Claim 4

A method of measuring the parameters of a complex electric circuit, comprising the steps of applying a constant voltage directly across its input in case the components thereof are connected in parallel; comparing the integral of current flowing through the complex electric circuit, in case the components thereof are connected in parallel, with two reference currents, one with the lesser value exceeding the constant component of the current integral; measuring the time interval between the instant said integral of current equals two said reference currents; reversing the polarity of said constant voltage after a calibrated time interval, which exceeds the value of the time constant of the complex electric circuit counting from the instant said constant voltage is applied to said circuit; measuring another time interval counting from said instant of reversing the polarity of said constant voltage until the instant the integral of current flowing through said complex electric circuit attains a value approximately equal to zero; cutting off said constant voltage supply; measuring the integral of current flowing through the complex electric circuit, depending on whose value, in conjunction with the two measured time intervals, the parameters of the complex electric circuit are determined.

Claim 5

A method of measuring the parameters of a complex electric circuit, comprising the steps of applying a linearly changing current to a complex electric circuit in case the components thereof are connected in series, comparing the voltage derived from the complex electric circuit in case the components thereof are connected in series with two reference voltages, one with the lesser value exceeding the constant component of said voltage; measuring the time interval between the instants said voltage equals said two reference voltages; reversing the direction of said linearly changing current after a calibrated time interval which exceeds the value of the time constant of the complex electric circuit counting from the instant said linearly changing current is applied to said circuit; measuring another time interval counting from said instant of reversing the direction of said linearly changing current until the instant the voltage derived from the complex electric circuit attains a value approximately equal to zero; discontinuing the reversal of said linearly changing current; measuring the voltage derived from the complex electric circuit, depending on whose value, in conjunction with the two measured time intervals, the parameters of the complex electric circuit are determined.

Claim 6

A method of measuring the parameters of a complex electric circuit, comprising the steps of applying a linearly changing current to a complex electric circuit in case the components thereof are connected in series, comparing the voltage derived from the complex electric circuit in case the components thereof are connected in series with two reference voltages, one with the lesser value exceeding the constant component of said voltage; measuring the time interval between the instants said voltage equals said two reference voltages; reversing the direction of said linearly changing current after a calibrated time interval which exceeds the value of the time constant of the complex electric circuit counting from the instant said linearly changing current is applied to said circuit; measuring another time interval counting from said instant of reversing the direction of said linearly changing current until the instant the voltage derived from the complex electric circuit attains a value approximately equal to zero; discontinuing the reversal of said linearly changing current; measuring the voltage derived from the complex electric circuit, depending on whose value, in conjunction with the two measured time intervals, the parameters of the complex electric circuit are determined.

Claim 7

A method of measuring the parameters of a complex electric circuit, comprising the steps of applying a constant current to a complex electric circuit in case the components thereof are connected in series; comparing the voltage derived from the complex electric circuit in case the components thereof are connected in series with two reference voltages, one with the lesser value exceeding the constant component of said voltage; measuring the time interval between the instants said voltage equals said two reference voltages; reversing the direction of said constant current after a calibrated time interval which exceeds the value of the time constant of the complex electric circuit conting from the instant said constant current is applied to said circuit; measuring another time interval counting from said instant of reversing the direction of said constant current until the voltage derived from the complex electric circuit attains a value approximately equal to zero; cutting off said constant current supply; measuring the voltage derived from the complex electric circuit, depending on whose value, in conjunction with the two measured time intervals, the parameters of the complex electric circuit are determined.

Claim 8

A method of measuring the parameters of a complex electric circuit, comprising the steps of applying a constant current to a complex electric circuit in case the components thereof are connected in series; comparing the voltage derived from the complex electric circuit in case the components thereof are connected in series with two reference voltages, one with the lesser value exceeding the constant component of said voltage; measuring the time interval between the instants said voltage equals said two reference voltages; reversing the direction of said constant current after a calibrated time interval which exceeds the value of the time constant of the complex electric circuit conting from the instant said constant current is applied to said circuit; measuring another time interval counting from said instant of reversing the direction of said constant current until the voltage derived from the complex electric circuit attains a value approximately equal to zero; cutting off said constant current supply; measuring the voltage derived from the complex electric circuit, depending on whose value, in conjunction with the two measured time intervals, the parameters of the complex electric circuit are determined.

Claim 9

A device for measuring the parameters of a complex electric circuit in case the componeNts thereof are connected in parallel, comprising: a source of constant voltage; a keying unit, whose first input is connected to the output of said source of constant voltage, while the second input is grounded; a reference element, to whose leadout is connected, via said complex electric circuit, the output of said keying unit; a voltage measuring unit electrically connected tO the leadout of said reference element; a comparison unit also electrically connected to the leadout of said reference element a control unit, the input thereof being connected to the output of said comparison unit, and in response to a signal derived therefrom, coinciding in time with the arrival of an external signal, said keying unit connecting its first input to its output; a time interval measuring unit, the input thereof being connected to the output of said control unit; a d.c. amplifier featuring parallel negative feedback ensuring the electrical connection of a common point of the complex electric circuit and the leadout of said reference element to said voltage measuring unit and to the comparison unit said comparison unit, at the instants the output voltage derived from said d.c. amplifier alternately equals two reference voltages and zero, sending three signals respectively to said voltage measuring unit and said control unit, the latter governing said time interval measuring unit in such a manner that the beginning of the first time interval being measured coincides in time with the first signal derived from said comparison unit, while the end thereof coincides with the second signal, the beginning of the second time interval being measured coincides in time with the end of the calibrated time interval counted from the instant an external signal arrives, while the end thereof coincides with the third signal derived from said comparison unit, said control unit, changing the state of said keying unit, whereat after a calibrated time interval following the arrival of the external signal, the output of said keying unit is connected to its third input, connected to a source of constant voltage whose polarity is opposite to that of said source of constant voltage; said keying unit connecting, at the instant the third signal arrives from said comparison unit, its second input to its output, said voltage measuring unit beginning the measurement of voltage across the output of said d.c. amplifier.

Claim 10

A device for measuring the parameters of a complex electric circuit in case the componeNts thereof are connected in parallel, comprising: a source of constant voltage; a keying unit, whose first input is connected to the output of said source of constant voltage, while the second input is grounded; a reference element, to whose leadout is connected, via said complex electric circuit, the output of said keying unit; a voltage measuring unit electrically connected tO the leadout of said reference element; a comparison unit also electrically connected to the leadout of said reference element a control unit, the input thereof being connected to the output of said comparison unit, and in response to a signal derived therefrom, coinciding in time with the arrival of an external signal, said keying unit connecting its first input to its output; a time interval measuring unit, the input thereof being connected to the output of said control unit; a d.c. amplifier featuring parallel negative feedback ensuring the electrical connection of a common point of the complex electric circuit and the leadout of said reference element to said voltage measuring unit and to the comparison unit said comparison unit, at the instants the output voltage derived from said d.c. amplifier alternately equals two reference voltages and zero, sending three signals respectively to said voltage measuring unit and said control unit, the latter governing said time interval measuring unit in such a manner that the beginning of the first time interval being measured coincides in time with the first signal derived from said comparison unit, while the end thereof coincides with the second signal, the beginning of the second time interval being measured coincides in time with the end of the calibrated time interval counted from the instant an external signal arrives, while the end thereof coincides with the third signal derived from said comparison unit, said control unit, changing the state of said keying unit, whereat after a calibrated time interval following the arrival of the external signal, the output of said keying unit is connected to its third input, connected to a source of constant voltage whose polarity is opposite to that of said source of constant voltage; said keying unit connecting, at the instant the third signal arrives from said comparison unit, its second input to its output, said voltage measuring unit beginning the measurement of voltage across the output of said d.c. amplifier.

Claim 12

A device for measuring the parameters of a complex electric circuit in case the components thereof are connected in parallel, comprising voltage; a keying unit, whose first input is connected to the output of said source of constant voltage while the second input is grounded; a reference element to whose leadout is connected, via said complex electric circuit, the output of said keying unit; a voltage measuring unit, electrically connected to the leadout of said reference element; a comparison unit, also electrically connected to the leadout of said reference element; a control unit, the input thereof being connected to the output of said comparison unit, and in response to a signal derived therefrom, coinciding in time with the arrival of an external signal, said keying unit connecting its first input to its output; a time interval measuring unit, the input thereof being connected to the output of said control unit; a d.c. amplifier featuring parallel negative feedback ensuring the electrical connection of a common point of the complex electric circuit and the leadout of said reference element to said voltage measuring unit and to the comparison unit; said comparison unit, at the instants the output voltage derived from said d.c. amplifier alternately equals two reference voltages and zero, sending three signals respectively to said voltage measuring unit and said control unit, the latter unit governing said time interval measuring unIt in such a manner that the beginning of the first time interval being measured coincides in time with the first signal derived from said comparison unit, while the end thereof coincides with the second signal, the beginning of the second time interval being measured coincides in time with the end of the calibrated time interval counted from the instant an external signal arrives, while the end thereof coincides in time with the third signal derived from said comparison unit; said control unit, changing the state of said keying unit, whereat after a calibrated time interval following the arrival of the external signal the output of said keying unit is connected to its third input, connected to a source of constant voltage, whose polarity is opposite to that of said source of constant voltage; said keying unit connecting, at the instant the third signal arrives from said comparison unit, its second input to its output, said voltage measuring unit beginning the measurement of the voltage across the output of said d.c. amplifier.

Claim 13

A device for measuring the parameters of a complex electric circuit in case the components thereof are connected in parallel, comprising voltage; a keying unit, whose first input is connected to the output of said source of constant voltage while the second input is grounded; a reference element to whose leadout is connected, via said complex electric circuit, the output of said keying unit; a voltage measuring unit, electrically connected to the leadout of said reference element; a comparison unit, also electrically connected to the leadout of said reference element; a control unit, the input thereof being connected to the output of said comparison unit, and in response to a signal derived therefrom, coinciding in time with the arrival of an external signal, said keying unit connecting its first input to its output; a time interval measuring unit, the input thereof being connected to the output of said control unit; a d.c. amplifier featuring parallel negative feedback ensuring the electrical connection of a common point of the complex electric circuit and the leadout of said reference element to said voltage measuring unit and to the comparison unit; said comparison unit, at the instants the output voltage derived from said d.c. amplifier alternately equals two reference voltages and zero, sending three signals respectively to said voltage measuring unit and said control unit, the latter unit governing said time interval measuring unIt in such a manner that the beginning of the first time interval being measured coincides in time with the first signal derived from said comparison unit, while the end thereof coincides with the second signal, the beginning of the second time interval being measured coincides in time with the end of the calibrated time interval counted from the instant an external signal arrives, while the end thereof coincides in time with the third signal derived from said comparison unit; said control unit, changing the state of said keying unit, whereat after a calibrated time interval following the arrival of the external signal the output of said keying unit is connected to its third input, connected to a source of constant voltage, whose polarity is opposite to that of said source of constant voltage; said keying unit connecting, at the instant the third signal arrives from said comparison unit, its second input to its output, said voltage measuring unit beginning the measurement of the voltage across the output of said d.c. amplifier.

Claim 15

A device for measuring the parameters of a complex electric circuit in case the components thereof are connected in series, comprising: a source of constant voltage; a keying unit, whose first input is connected to the output of said source of constant voltage; while the second input is grounded a reference element, by whose means the output of said keying unit is connected to the leadout of said complex electric circuit; a voltage measuring unit electrically connected to the leadout of said complex electric circuit; a comparison unit, also electrically connected to the leadout of said complex electric circuit: a control unit, the input thereof being connected to the output of said comparison unit, and in response to a signal derived therefrom, coinciding in time with the arrival of an external signal, said keying unit connecting its first input to its output; a time interval measuring unit, the input thereof being connected to the output of said control unit; a d.c. amplifier featuring parallel negative feedback ensuring the electrical connection of a common point of the reference element and of the leadout of the complex electric circuit to said voltage measuring unit and to the comparison unit; said comparison unit, at the instants the output voltage of said amplifier alternately equals two reference voltages and zero, sending three signals respectively to said voltage measuring unit and said control unit, the latter unit governing said time interval measuring unit in such a manner that the beginning of the first time interval being measured coincides in time with the first signal derived from said comparison unit, while the end thereof coincides with the second signal, the beginning of the second time interval being measured coincides in time with the end of the calibrated time interval counted from the instant an external signal arrives, while the end thereof coincides in time with the third signal derived from said comparison unit; said control, unit changing the stage of said keying unit, whereat after a calibrated time interval following the arrival of the external signal, the output of said keying unit is connected to its third input, connected to a source of constant voltage, whose polarity is opposite to that of said source of constant voltate; said keying unit connecting, at the instant the third signal arrives from the comparison unit, its second input to its output, said voltage measuring unit beginning the measurement of the voltage across the output of said d.c. amplifier.

Claim 16

A device for measuring the parameters of a complex electric circuit in case the components thereof are connected in series, comprising: a source of constant voltage; a keying unit, whose first input is connected to the output of said source of constant voltage; while the second input is grounded a reference element, by whose means the output of said keying unit is connected to the leadout of said complex electric circuit; a voltage measuring unit electrically connected to the leadout of said complex electric circuit; a comparison unit, also electrically connected to the leadout of said complex electric circuit: a control unit, the input thereof being connected to the output of said comparison unit, and in response to a signal derived therefrom, coinciding in time with the arrival of an external signal, said keying unit connecting its first input to its output; a time interval measuring unit, the input thereof being connected to the output of said control unit; a d.c. amplifier featuring parallel negative feedback ensuring the electrical connection of a common point of the reference element and of the leadout of the complex electric circuit to said voltage measuring unit and to the comparison unit; said comparison unit, at the instants the output voltage of said amplifier alternately equals two reference voltages and zero, sending three signals respectively to said voltage measuring unit and said control unit, the latter unit governing said time interval measuring unit in such a manner that the beginning of the first time interval being measured coincides in time with the first signal derived from said comparison unit, while the end thereof coincides with the second signal, the beginning of the second time interval being measured coincides in time with the end of the calibrated time interval counted from the instant an external signal arrives, while the end thereof coincides in time with the third signal derived from said comparison unit; said control, unit changing the stage of said keying unit, whereat after a calibrated time interval following the arrival of the external signal, the output of said keying unit is connected to its third input, connected to a source of constant voltage, whose polarity is opposite to that of said source of constant voltate; said keying unit connecting, at the instant the third signal arrives from the comparison unit, its second input to its output, said voltage measuring unit beginning the measurement of the voltage across the output of said d.c. amplifier.

Claim 18

A device for measuring the parameters of a complex electric circuiT in case the components thereof are connected in series, comprising: a source of constant voltage; a keying unit, whose first input is connected to the output of said source of constant voltage, while the second input is grounded; a reference element, by whose means of the output of said keying unit is connected to the leadout of said complex electric circuit; a voltage measuring unit electrically connected to the leadout of said complex electric circuit; a comparison unit, also electrically connected to the leadout of said complex electric circuit; a control unit, the input thereof being connected to the output of said comparison unit, and in response to a signal derived therefrom, coinciding in time with the arrival of an external signal, said keying unit connecting its first input to its output; a time interval measuring unit, the input thereof being connected to the output of said control unit; a d.c. amplifier featuring parallel negative feedback ensuring the electrical connection of a common point of said reference element and of the leadout of the complex electric circuit to said voltage measuring unit and to the comparison unit; said comparison unit at the instant the output voltage of said amplifier alternately equals two reference voltages and zero, sending three signals respectively to said voltage measuring unit and said control unit, the latter unit governing said time interval measuring unit in such a manner that the beginning of the first time interval being measured coincides in time with the first signal derived from said comparison unit, while the end thereof coincides with the second signal, the beginning of the second time interval being measured coincides in time with the end of the calibrated time interval counted from the instant an external signal arrives, while the end thereof coincides in time with the third signal derived from said comparison unit; said control unit changing the state of said keying unit, whereat after a calibrated time interval following the arrival of the external signal, the output of said keying unit is connected to its third input, connected to a source of constant voltage, whose polarity is opposite to that of said source of constant voltage; said keying unit connecting, at the instant the third signal arrives from said comparison unit, its second input to its output, said voltage measuring unit beginning the measurement of the voltage across the output of said d.c. amplifier.

Claim 19

A device for measuring the parameters of a complex electric circuiT in case the components thereof are connected in series, comprising: a source of constant voltage; a keying unit, whose first input is connected to the output of said source of constant voltage, while the second input is grounded; a reference element, by whose means of the output of said keying unit is connected to the leadout of said complex electric circuit; a voltage measuring unit electrically connected to the leadout of said complex electric circuit; a comparison unit, also electrically connected to the leadout of said complex electric circuit; a control unit, the input thereof being connected to the output of said comparison unit, and in response to a signal derived therefrom, coinciding in time with the arrival of an external signal, said keying unit connecting its first input to its output; a time interval measuring unit, the input thereof being connected to the output of said control unit; a d.c. amplifier featuring parallel negative feedback ensuring the electrical connection of a common point of said reference element and of the leadout of the complex electric circuit to said voltage measuring unit and to the comparison unit; said comparison unit at the instant the output voltage of said amplifier alternately equals two reference voltages and zero, sending three signals respectively to said voltage measuring unit and said control unit, the latter unit governing said time interval measuring unit in such a manner that the beginning of the first time interval being measured coincides in time with the first signal derived from said comparison unit, while the end thereof coincides with the second signal, the beginning of the second time interval being measured coincides in time with the end of the calibrated time interval counted from the instant an external signal arrives, while the end thereof coincides in time with the third signal derived from said comparison unit; said control unit changing the state of said keying unit, whereat after a calibrated time interval following the arrival of the external signal, the output of said keying unit is connected to its third input, connected to a source of constant voltage, whose polarity is opposite to that of said source of constant voltage; said keying unit connecting, at the instant the third signal arrives from said comparison unit, its second input to its output, said voltage measuring unit beginning the measurement of the voltage across the output of said d.c. amplifier.