DC offset reduction in a zero-if transmitter

Details DC offset reduction in a zero-if transmitter DC offset reduction in a zero-if transmitter

1993-06-30

1996-12-10

Pham, Chi H.

Telecommunications

Transmitter

With feedback of modulated output signal

455115, 455324, 375296, H04B 104

Patent

active

055840590

ABSTRACT:
A zero-IF transmitter (200) has a DC offset, representative of a carrier feedthrough signal. A value to correct the DC offset is successively approximated (207). A summer (201) adds the value to a desired input to reduce the DC offset.

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Cavers, J. K., et al, "Adaptive Compensation For Imbalance And Offset Losses In Direct Conversion Transceivers", Vehicular Technology, 1991 Conference. pp. 578-583.
Cavers, J. K. et al, "Adaptive Compensation For Imbalance And Offset Losses In Direct Conversion Transceivers", IEEE Transactions On Vehicular Technology, vol. 42, No. 4, 1993.

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