The asymmetric digital subscriber line receive channel includes: first and second
external resistors 20 and 22 coupled to a telephone line 24 and
26; a coarse programmable gain amplifier CPGA formed in a low voltage process
having inputs coupled to the first and second external resistors 20 and
22; and a fine programmable gain amplifier PGA1 coupled to an output
of the coarse programmable gain amplifier CPGA, and having a very fine gain trim
adjustment to compensate for a mismatch between the external resistors 20 and
22 and the coarse programmable gain amplifier CPGA.
