Method and device for conditioning a periodic analog signal

A method for conditioning a periodic analog signal to have positive and negative desired peak values, comprising:

• detecting a peak value of the periodic analog signal;
• sequentially performing signal correcting steps, each signal correcting step comprising a multiplicative correcting step which modifies the amplitude of the periodic analog signal, and an additive correcting step which adds to the periodic analog signal a constant so as to change the offset of the periodic analog signal in a positive or negative direction, the sequence of signal correcting steps being performed in a portion of a period of the periodic analog signal and reducing a difference between the detected peak value and a desired peak value in a stepwise manner;
• and
• following the step of detecting and prior to performing the signal correcting steps, selectively performing a plurality of adjusting steps to adjust a reference signal in a stepwise manner from the desired peak value to approximately the detected peak value, the number of adjusting steps equaling the number of signal correcting steps, the periodic analog signal being modified in a signal correcting step substantially the same as the reference signal is adjusted in a corresponding adjusting step.

A device for conditioning at least one periodic analog signal, comprising:

• an adjusting circuit to which a first periodic analog signal is supplied and which selectively amplifies the first periodic analog signal and selectively provides a signal offset thereto;
• and
• a compare circuit coupled to an output of the adjusting circuit for comparing a peak value of the first periodic analog signal to an adjustable reference signal, the compare circuit generating control signals that are based upon the comparison for controlling the adjusting circuit so that the first periodic analog signal is adjusted by the adjusting circuit in each of a plurality of steps, the plurality of steps occurring within a portion of a period of the periodic analog signal;
• wherein the compare circuit comprises an adjustable reference source for generating the adjustable reference signal, the adjustable reference signal being an analog signal, the compare circuit adjusting the adjustable reference signal in sequential stepped levels between a predetermined value corresponding to a desired peak value and a peak value of the first periodic analog signal, and one or more storage elements for maintaining one or more values corresponding to a number of stepped levels utilized in adjusting the reference signal.

A device for conditioning at least one periodic analog signal, comprising:

• an adjusting circuit to which a first periodic analog signal is supplied and which selectively amplifies the first periodic analog signal and selectively provides a signal offset thereto;
• a compare circuit coupled to an output of the adjusting circuit for comparing a peak value of the first periodic analog signal to an adjustable reference signal, the compare circuit generating control signals that are based upon the comparison for controlling the adjusting circuit so that the first periodic analog signal is adjusted by the adjusting circuit in each of a plurality of steps, the plurality of steps occurring within a portion of a period of the periodic analog signal;
• a second adjusting circuit to which a second periodic analog signal is supplied and which selectively amplifies the second periodic analog signal and selectively provides a signal offset thereto;
• and
• a second compare circuit coupled to an output of the second adjusting circuit for comparing a peak value of the second periodic analog signal to a second adjustable reference signal, the compare circuit generating control signals that are based upon the comparison for controlling the second adjusting circuit so that the second periodic analog signal is adjusted by the second adjusting circuit in each of a plurality of steps, the plurality of steps occurring within a portion of the second periodic analog signal;
• a third adjusting circuit to which a third periodic analog signal is supplied and which selectively amplifies the third periodic analog signal and selectively provides a signal offset thereto;
• a third compare circuit coupled to an output of the third adjusting circuit for comparing a peak value of the third periodic analog signal to a third adjustable reference signal, the compare circuit generating control signals that are based upon the comparison for controlling the third adjusting circuit so that the third periodic analog signal is adjusted by the third adjusting circuit in a stepwise manner;
• and
• a level comparator circuit for comparing the first and second periodic analog signals and indicating when the first and second periodic analog signals are substantially the same, the third adjusting circuit and the third compare circuit being initiated to adjust the third periodic analog signal by the level comparator.

A device for conditioning at least one periodic analog signal, comprising:

• an adjusting circuit to which a first periodic analog signal is supplied and which selectively amplifies the first periodic analog signal and selectively provides a signal offset thereto;
• a compare circuit coupled to an output of the adjusting circuit for comparing a peak value of the first periodic analog signal to an adjustable reference signal, the compare circuit generating control signals that are based upon the comparison for controlling the adjusting circuit so that the first periodic analog signal is adjusted by the adjusting circuit in each of a plurality of steps, the plurality of steps occurring within a portion of a period of the periodic analog signal;
• a second adjusting circuit to which a second periodic analog signal is supplied and which selectively amplifies the second periodic analog signal and selectively provides a signal offset thereto;
• and
• a second compare circuit coupled to an output of the second adjusting circuit for comparing a peak value of the second periodic analog signal to a second adjustable reference signal, the compare circuit generating control signals that are based upon the comparison for controlling the second adjusting circuit so that the second periodic analog signal is adjusted by the second adjusting circuit in each of a plurality of steps, the plurality of steps occurring within a portion of the second periodic analog signal;
• and
• phase correcting circuitry for adjusting a phase difference between the periodic analog signal and the second periodic analog signal, comprising circuitry for generating an auxiliary signal based upon the periodic analog signal and the second periodic analog signal and for incrementally displacing the phase between the periodic analog signal and the second periodic analog signal based upon the auxiliary signal.

A method of conditioning on a periodic analog signal, comprising:

• performing a sequence of error detection operations on a reference signal in a stepwise manner during a portion of a period of the periodic analog signal so that the reference signal is adjusted from a predetermined level to a peak level of the periodic analog signal;
• and
• performing a sequence of error correction operations on the periodic analog signal in a stepwise manner during a portion of a period of the periodic analog signal so that the periodic analog signal is modified to be within a predetermined range of levels, each error correction operation comprising:
• amplifying the periodic analog signal;
• and
• providing a signal offset to the periodic analog signal during the time the periodic analog signal is being amplified, the number of error correction operations equaling the number of error detection operations, and each error detection operation adjusting the reference signal in a similar manner that the corresponding error correction operation adjusts the periodic analog signal.