US 12,306,224 B2
Electricity meter
Andrew Dames, Cambridge (GB); Joseph Adam, Cambridge (GB); and Jason Morgan, Cambridge (GB)
Assigned to SENSUS SPECTRUM LLC, New Castle, DE (US); and SENSUS USA INC., New Castle, DE (US)
Appl. No. 17/426,384
Filed by SENTEC LTD, Cambridge (GB)
PCT Filed Jan. 28, 2020, PCT No. PCT/GB2020/050185
§ 371(c)(1), (2) Date Jul. 28, 2021,
PCT Pub. No. WO2020/157477, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 1901223 (GB), filed on Jan. 29, 2019.
Prior Publication US 2022/0091167 A1, Mar. 24, 2022
Int. Cl. G01R 21/133 (2006.01); G01R 21/06 (2006.01)
CPC G01R 21/133 (2013.01) [G01R 21/06 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electricity meter comprising:
a converter configured to synchronously modulate current and voltage measurement signals and output synchronously-modulated current and voltage measurement signals wherein the converter comprises first and second modulators configured to synchronously modulate the current and voltage measurement signals, respectively, and to output the synchronously-modulated current and voltage measurement signals, respectively; and
a measurement module configured to receive the synchronously-modulated current and voltage measurement signals from the converter and to process the synchronously-modulated current and voltage measurement signals, wherein the measurement module comprises:
first and second analog-to-digital converters for digitizing the synchronously-modulated current and voltage measurement signals, respectively and outputting digitized, synchronously-modulated current and voltage measurement signals, wherein the first and second modulators comprise:
respective signal input(s) for the measurement signal(s);
respective timing reference inputs for receiving a timing reference;
respective switches arranged to be synchronously switched using the timing reference for chopping or inverting the measurement signal(s); and
respective modulated signal output(s) for the synchronously-modulated measurement signal(s).