An analog memory for a QCIF format image frame storage

An analog memory suitable for storage of a photogenerated image frame is described. An architecture that allows a fast writing rate is presented. The memory has a serial input and eight channels parallel output; it can store a QCIF image (176×144 pixels) for 1/15 sec with an equivalent precision of 7 bit. Nominal input writing frequency is 2.5 MHz and output reading frequency is 0.833 MHz. The chip needs an external reference clock at 2.5 MHz. The single cell size is 22×21.2 μm. The consumption power of the chip is 6 mW@5 Volts power supply. It has been made using a 0.7 μm CMOS technology supplied by SGS-Thomson