A circuit for combining analog signals includes first and second bitstream generators and a directional coupled connected therewith. The first bitstream generator receives a first analog signal and generates a first digital bitstream as a function thereof. The second bitstream generator receives a second analog signal and generates a second digital bitstream as a function thereof. The first and second bitstream generators are configured to maintain a ninety-degree phase difference between the first and second digital bitstreams. The directional coupler receives, at a first port, the first digital bitstream, and receives, at a second port, the second digital bitstream. The directional coupler includes a third port that is terminated, and a fourth port which generates a first output signal indicative of a combination of the first and second digital bitstreams in a manner that an image component is suppressed without a need for filtering.