Patent ID: 7190132

Claim:
A motor control circuit, comprising: a first relay configured for operably coupling a power source to a first relay output when a first control signal is asserted, and operably coupling a ground to the first relay output when the first control signal is negated; a second relay configured for operably coupling the power source to a second relay output when a second control signal is asserted, and operably coupling the ground to the second relay output when the second control signal is negated; a logic element configured for negating an enable signal if both the first control signal and the second control signal are asserted, negating the enable signal if both the first control signal and the second control signal are negated, and otherwise asserting the enable signal; a third relay configured for operably coupling the first relay output to a first motor terminal when the enable signal is asserted, and operably coupling a third relay input to the first motor terminal when the enable signal is negated; a fourth relay configured for operably coupling the second relay output to a second motor terminal when the enable signal is asserted, and operably coupling a fourth relay input to the second motor terminal when the enable signal is negated; and a connection element operably coupling the third relay input to the fourth relay input.