Patent ID: 8901969

Claim:
A bi-directional driver to drive a load device, comprising: an H-bridge driver including a non-inverting amplifier having an operational amplifier and an inverting amplifier having an operational amplifier, the non-inverting amplifier and the inverting amplifier commonly receiving a control signal; and an H-bridge including, a first unit having a high side transistor and a low side transistor, the high side transistor and the low side transistor of the first unit being diagonally connected with respect to the load device and commonly receiving an output of the non-inverting amplifier, and a second unit having a high side transistor and a low side transistor, the high side transistor and the low side transistor of the second unit being diagonally connected with respect to the load device and commonly receiving an output of the inverting amplifier, wherein an inverting input of the operational amplifier of the non-inverting amplifier is coupled with an output of the first unit, and an inverting input of the operational amplifier of the inverting amplifier is coupled with an output of the second unit, wherein the load device is connected between the output of the first unit and the output of the second unit, wherein the low side transistor of the first unit fully turns on and the high side transistor of the first unit linearly operates in response to the control signal being greater than a critical value, and wherein the low side transistor of the second unit fully turns on and the high side transistor of the second unit linearly operates in response to the control signal being less than the critical value.