Method and apparatus for imparting positive phase slope to a narrowband signal

An apparatus for processing an input signal comprising an input amplitude and a sinusoidal component at .omega..sub.0 radians per second, said apparatus comprising:

• a signal divider for creating a first signal, comprising a first amplitude, based on said input signal and for inputting said first signal onto a first signal path, and for creating a second signal, comprising a second amplitude, based on said input signal and for inputting said second signal onto a second signal path, wherein said first signal and said second signal are each analog representations of said input signal;
• a signal combiner for receiving said first signal from said first signal path, and for receiving said second signal from said second signal path, and for creating an output signal, comprising an output amplitude, based on the sum of said first signal and said second signal;
• a first gain control block in said first signal path for modifying said amplitude of said first signal;
• a delay element in said second signal path for making said second signal path substantially close to ##EQU17## seconds longer than said first signal path, where N is a positive odd integer;
• and
• a second gain control block in said second signal path for modifying said second amplitude of second signal.