Analog adaptive FIR filter having independent coefficient sets for each filter tap

An analog finite impulse response filter having a filter input and a filter output, the filter comprising:

• a set of N≧2 multipliers, each having first and second multiplier inputs and providing a corresponding multiplier output;
• a set of N track and hold taps in one to one correspondence with said set of multipliers, each of said taps receiving said filter input and providing a tap output that remains constant except when said tap is triggered to set said tap output to a sample of said filter input, wherein said tap output is provided as said first input of said corresponding multiplier;
• a set of N coefficient selectors in one to one correspondence with said set of multipliers, each of said coefficient selectors including N tap coefficients and providing a selected one of said tap coefficients to said second input of said corresponding multiplier, wherein said selected tap coefficient is selected according to a time delay since said corresponding tap was most recently triggered;
• and
• a summing junction receiving all of said multiplier outputs and providing their sum as said filter output.