Patent ID: 7151814

Claim:
A system for adjusting the phase signal of a Hogge phase detector, the system comprising: a Hogge phase detector having an input to accept a data input signal, an input to accept a clock signal, an output to supply differential reference signals, and an output to supply differential phase signals; and, an amplitude adjust circuit including: a first emitter-coupled differential amplifier having inputs to accept the differential phase signal and outputs to supply amplitude modified phase signal; a first current source connected to the emitters of the first differential amplifier having an input to accept the adjust signal; and, a temperature compensation circuit connected to supply temperature compensation current to the first current source; wherein the first current source includes: a first bipolar transistor having a collector connected to the emitters of the first differential amplifier; and, a first resistor interposed between the emitter of the first bipolar transistor and the adjust signal; wherein the temperature compensation circuit includes; a first field effect transistor (FET) having a drain connected to a first power supply (Vcc), and a gate connected to the source; a second FET having a drain connected to the first power supply and a gate connected to the source of the first FET; a second bipolar transistor having a base and collector connected to the source of the first FET; a third bipolar transistor having a base and collector connected to the source of the second FET, and an emitter connected to the base of the first bipolar transistor; a second current source connected to the emitter of the second bipolar transistor; and, a third current source connected to the emitter of the third bipolar transistor.