Said oscillator means comprises a phase monitoring and correction network responsive to said line frequency, f in and coupled between the intput to and output of said shift register for deriving said sampling frequency, f c, in synchronism with said line frequency, f in. Said digital circuit means comprises at least one N stage shift register Said sampling frequency, f c, is selected substantially as: 6Nf in. Said first and second monitoring means respective first and second electrical parameters occur at a given line frequency, f in and Said sampling frequency, f c, is selected substantially as: #EQU3# where X° is a selected phase shift in degrees. The apparatus of claim 3 including divider means manually actuable and coupled with said oscillator means output for dividing said sampling frequency, f c, in half prior to the submittal thereof to said digital circuit. Said sampling frequency, f c, is selected substantially as: 4Nf in.Ĥ. Said first and second monitoring means respective first and second electrical parameters occur at a given line frequency, f in, and Said oscillator means is a crystal controlled oscillator. Said digital circuit means comprises at least one N stage shift register and Switching circuit means coupled with said second monitoring means and to said digital circuit means output and actuable in response to said replicated pulse train signal to effect the application of said second signal to said filter means. Oscillator means having an output coupled with said digital circuit means for generating said clock inputs and N position digital circuit means having an input coupled with said time division converter output and responsive to clock inputs at sampling frequency, f c, for substantially replicating said pulse width modulated pulse train signal continuously at an output thereof to effect a select time delay of said pulse train Time division converter means responsive to said first signal for deriving a pulse width modulated pulse train signal corresponding therewith at an output įilter means means for selectively receiving said second signal for deriving a product categorized power evaluating signal Second monitoring means for providing a second signal corresponding with a second monitored electrical parameter Power and energy evaluating apparatus, comprising:įirst monitoring means for providing a first signal corresponding with a first monitored electrical parameter TIME-DIVISION MULTIPLYING CIRCUIT ARRANGEMENTS WITH PHASE COMPENSATIONĮLECTRONIC WATTMETERS UTILISING AN AMPLITUDE AND WIDTH MODULATED PULSE TRAINĪNALOG TIME-DIVISION MULTIPLIER WITH RECIRCULATING STORAGEġ. MULTIPLIER, DIVIDER AND WATTMETER USING A SWITCHING CIRCUIT AND A PULSE-WIDTH AND FREQUENCY MODULATOR MARK-SPACE MODULATOR FOR A TIME-DIVISION MULTIPLIER Watt/watthour transducer and integrator and current sources thereforĮlectronic energy consumption meter with input transformer having single resistance terminated secondary winding coupled to C-MOS switches driven by pulse width modulated control signals Watt/watt hour transducer having current signals and a modulator therefor Multiplier for producing phase shift error-free signal representing product of out-of-phase inputs Watt/watthour transducer and amplifier-filter therefor Watt meter providing electrical signal proportional to powerĮlectronic kWh meter having internal power supply and error correction system Analog multiplier error corrector, notably for precision wattmeters
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