71M6513 Broadband VARh Harmonic Performance

71M6513 Broadband VARh Harmonic Performance 

Teridian Semiconductor Corporation has  developed  a custom compute engine firmware to support the energy

metering in the presence of harmonics. The Compute Engine firmware CE13B11 was developed to provide the

following capabilities:

1.  Broadband VARh measurement capability 

2.  A zero-latency pulse output.  

Deleted features from the previous version are VARPULSE and certain EQU features.  Aside from VAR, EQU,

WPULSE, and VARPULSE, no other features have been changed.

Broadband VAR

The previous CE code shifted the fundamental and all harmonics by 90 degrees, but exhibited a 1/f amplitude

characteristic on harmonics. Specifically, the fundamental, regardless of frequency, was always shifted at unity

gain. The third harmonic was attenuated by 3x, the fifth by 5x, etc.