What is daughter board?

Answer 1

Many times an electronics circuits can not fit into one printed circuit board (PCB) either due to electrical or mechanical or other system design constraints or considerations. In such cases, there is many times one PCB is fixed on top of another board generally through mating connectors or a flex. circuit/cable. In such cases, the smaller board placed on a main board (mother board) is called a daughter board. In same sense all the boards plugged in the computer motherboard sockets are daugher boards. - Neeraj Sharma