Numerically Controlled Oscillator/Modulator

The Intersil HSP45116/883 combines a high performance quadrature numerically controlled oscillator (NCO) and a high speed 16-bit Complex Multiplier/Accumulator (CMAC) on a single IC. This combination of functions allows a complex vector to be multiplied by the internally generated (cos, sin) vector for quadrature modulation and demodulation. As shown in the Block Diagram, the HSP45116/883 is divided into three main sections. The Phase/Frequency Control Section (PFCS) and the Sine/Cosine Section together form a complex NCO. The CMAC multiplies the output of the Sine/Cosine Section with an external complex vector.

Features

• This Circuit is Processed in Accordance to MIL-STD-883 and is Fully Conformant Under the Provisions of Paragraph 1.2.1.

• NCO and CMAC on One Chip

• 15MHz and 25.6MHz Versions

• 32-Bit Frequency Control

• 16-Bit Phase Modulation

• 16-Bit CMAC

• 0.006Hz Tuning Resolution at 25.6MHz

• Spurious Frequency Components < -90dBc

• Fully Static CMOS

Applications

• Frequency Synthesis

• Modulation - AM, FM, PSK, FSK, QAM

• Demodulation, PLL

• Phase Shifter

• Polar to Cartesian Conversions