Biopsy system and biopsy driver use for therewith

A biopsy driver, comprising:

• a housing;
• a battery supply contained in the housing, the battery supply having a positive terminal and a negative terminal, the negative terminal being selectively coupled to a chassis ground;
• a motor contained in the housing, the motor having a driveshaft, the motor having a first power input terminal and a second power input terminal;
• a trigger coupled to the housing and accessible external to the housing;
• and
• a control circuit mounted to the housing and electrically coupled to the motor, the control circuit having a trigger switch circuit having a circuit trace arrangement and a movable contactor element, the circuit trace arrangement having a plurality of elongate electrical contact rows, the movable contactor element having a plurality of contactor prongs, the movable contactor element being mechanically connected to the trigger, the trigger and the movable contactor element have an OFF range of positions and an ON range of positions,
• the plurality of elongate electrical contact rows including a first elongate electrical contact row having a first electrical contact strip that is connected to the chassis ground, the plurality of contactor prongs having a first electrical contactor prong positioned for sliding engagement with the first elongate electrical contact row, the trigger configured to slidably move the first electrical contactor prong from the OFF range of positions spaced from the first electrical contact strip and the chassis ground to the ON range of positions coupled to the first electrical contact strip and the chassis ground along the first electrical contact strip to physically move an electrical connection between the first electrical contactor prong of the movable contactor element and the chassis ground.