Patent ID: 8588289

Claim:
An apparatus including circuitry for adaptive signal equalizing with coarse and fine boost controls, comprising: differential amplifier circuitry responsive, in accordance with a variable signal gain, to at least one controlled supply current and a differential input signal by providing a differential output signal; current source circuitry coupled to said differential amplifier circuitry and responsive to at least a first control signal by providing said at least one controlled supply current; a variable impedance coupled to said differential amplifier circuitry and responsive to at least a second control signal by establishing said variable signal gain; wherein said variable impedance comprises a tunable impedance and a fixed impedance mutually coupled; wherein said tunable impedance and fixed impedance are mutually coupled in parallel; wherein said tunable impedance comprises a capacitance and at least one transistor mutually coupled; wherein said capacitance and at least one transistor are mutually coupled in series; and wherein said fixed impedance comprises a resistance.