Patent ID: 11909411
Assignee: VIAVI SOLUTIONS INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. An apparatus to reduce spurs in a digital to analog conversion, the apparatus comprising:
an input configured to receive a digital signal;
a first digital to analog converter configured to receive the digital signal and generate a first component analog signal;
a first balun configured to receive a differential input of the first component analog signal from the first digital to analog converter and output the first component analog signal to an analog combiner based on the differential input;
a signal inverter configured to convert the digital signal and generate an inverted digital signal;
a second digital to analog converter configured to receive the inverted digital signal and generate a second component analog signal;
a second balun configured to receive an inverted differential input of the first component analog signal from the second digital to analog converter and output the second component analog signal to the analog combiner based on the inverted differential input; and
the analog combiner configured to generate an output analog signal with reduced spurs by subtracting a spur in the first component analog signal from a corresponding spur in the second component analog signal.