MOS multiplier/divider cell for analogue VLSI

A novel all-MOS continuous-time multiplier/divider parameterised cell is introduced. It comprises eight MOS transistors and a single operational amplifier. The new cell is highly reconfigurable, versatile, extremely simple to design and its output its conveniently programmed via DC control voltages. Some of the many applications of the new cell in analogue VLSI signal processing include analogue multiplication, signal squaring, division, signal inversion, amplitude modulation and RMS/DC conversion. Moreover, the new cell is easily extendable to achieve analogue vector multiplication, and hence it lends itself naturally to analogue MOS VLSI implementation of feedback/feedforward neural networks.