Accession Number : ADD017821

Title :   Arbitrary Waveform Generator.

Descriptive Note : Patent, Filed 2 Feb 95, patented 31 Oct 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Griffin, Maurice J ; Sugawara, Glenn S

Report Date : 31 Oct 1995

Pagination or Media Count : 10

Abstract : This report describes a system for storing an arbitrary waveform on non-volatile random access memory (NVRAM) device and generating an analog signal using the NVRAM device. A central processing unit is used to synthesize an arbitrary waveform and create a digital representation of the waveform and transfer the digital representation to a microprocessor which, in turn, writes the digital data into an NVRAM device which has been mapped into a portion of the microprocessor address space. The NVRAM device is removed address space and placed into an independent waveform generation unit. tn the waveform generation unit, an address clock provides an address timing signal and a cycle clock provides a transmit signal. Both signals are applied to an address generator. When both signals are present, the address generator generates and transmits to the NwRAM device a new address for each cycle of the address timing signal. In response to each new address generated, the NVRAM devices provides a digital output which is applied to a digital to analog converter. The converter produces a continuous analog out-put which is smoothed by a filter to produce the arbitrary waveform.

Descriptors :   *RANDOM ACCESS COMPUTER STORAGE, *NONVOLATILE MEMORIES, *PATENTS, *WAVEFORM GENERATORS, DATA BASES, OUTPUT, DIGITAL SYSTEMS, CLOCKS, MICROPROCESSORS, CYCLES, TIME SIGNALS, ANALOG SIGNALS, DIGITAL TO ANALOG CONVERTERS

Subject Categories : Computer Hardware
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE