A broadcast receiver capable of receiving correct channel information anytime, even if a network to which the broadcast receiver is connected changes to another one, includes a storage unit and a controller. The energy map includes energy information related to energy consumption and energy recharging of various power sources along various roadway segments. The screw may also pass through the detent and if tightened against an underlying plate keeps the detent disengaged to facilitate adjustment of the splint. The second MOS transistor with transconductance gm amplifies a second differential input signal to provide a second current between the output node and the ground.