A technology independent synthesis system which rapidly generates the layout of analog VLSI circuits has been developed. Based on a specification of a circuit's required performance and the target process, design rule correct layout is generated. The complete system has been tested by synthesizing op-amps in the CMOS and bipolar domains. Comparison of the specification with results of simulating the circuit extracted from the synthesized layout, show that the system is accurate to within a few per cent for most parameters.