Patent ID: 8493140

Claim:
An apparatus for automatically disabling amplification of a first signal and a second signal until steady state amplification is available, including: (a) a first amplifier that includes an input, a reference input and an output, the input is coupled to the first signal; (b) a second amplifier that includes a reference input, a control input and an output, wherein the outputs of the first and second amplifiers are adapted for driving a load there between; (c) a third amplifier that includes an input, a reference input and an output, the input is coupled to the second signal; (d) a fourth amplifier that includes a reference input, a control input and an output; wherein the outputs of the third and fourth amplifiers are adapted for driving another load there between; (e) a reference circuit that generates a reference voltage that is coupled to the reference inputs of the first, second, third and fourth amplifiers, the reference voltage transitions from a start voltage to a final voltage during a first time period; and (f) a control circuit that controls the functional operation of the second, and fourth amplifiers, including: (i) disabling the second and fourth amplifiers from providing a return path for each respective load during the first time period to prevent the introduction of transient effects into the respective loads; and (ii) when the first time period is over and when either one of the first signal and the second signal exceeds a predetermined amount, the control circuit enables the second and fourth amplifiers to provide steady state amplification of the signals such that transient effects are further minimized into the loads.