The objective of the proposed research is to develop a passive imaging receiver with flicker noise and multiplicative noise suppression capability to improve the resolution of the system. In the first part of the project, a Dicke switch-based system which has 50% time efficiency is designed and implemented. A comprehensive noise analysis is done to investigate the parameters that degrade low frequency noise suppression capability of the system. This investigation reveals that clock duty cycle of the chopper degrades the noise suppression performance. Therefore, a structure is proposed to overcome the sensitivity of the multiplicative noise suppression to duty cycle offset and also it has 100% time efficiency which improves the resolution of the system.