Consumer Radio Goes LSI

Large Scale Integration (LSI) and Metal-Oxide-Semiconductor Field Effect Transistors (MOS-FETs) have been successfully combined to produce a monolithic integrated circuit developed specifically for a consumer product. The product, an AM/FM: Digital Clock radio (Figs. 1 and 2) utilizes a silicon chip (Fig. 3) approximately 1/8 inch square to operate the totally electronic timer portion of the product. This paper will discuss only the electronic timer portion of the clock radio.