Precise measurement of dielectric characteristics of materials is becoming necessity in several engineering applications. The dielectric constant measurement over wide frequency range for emerging applications such as PCB manufacturing, agriculture, environmental and food processing industries has several challenges. With the advancement in digital VLSI and Field Programmable Gate Array (FPGA) based processing the digital techniques for estimating the dielectric constant are feasible. In this paper, the digital based frequency generation techniques over wide frequency are discussed in this paper. The multi-phase Numerically Controlled Oscillator (NCO) based technique for generating high frequency signals are experimented in this paper.