Title :
A high-speed direct frequency synthesizer
Author :
Saul, Peter H. ; Taylor, David G.
Author_Institution :
Plessey Res. & Technol., Towcester, UK
fDate :
2/1/1990 12:00:00 AM
Abstract :
A UHF direct frequency synthesizer, which is primarily intended for radar and electronic warfare applications, is described. The device generates square-, sine-, and triangle-wave outputs, true and complement, in-phase and quadrature, over the range 1 Hz to 500 MHz. It is a fully integrated design, including two digital-to-analog converters (DACs), each of which has a faster operating specification than any DAC currently available. The circuit is composed of a number of structured circuit blocks, each of which can be tested independently on the chip. This approach has benefits both during device evaluation and as an aid to minimizing production test times. The chip is implemented in a 1 μm silicon bipolar process
Keywords :
bipolar integrated circuits; digital integrated circuits; frequency synthesizers; function generators; 1 micron; 1 to 500 MHz; DAC; EW; Plessey Process HE; Si; UHF; bipolar IC; digital implementation; direct frequency synthesizer; electronic warfare applications; fully integrated design; function generation; high-speed; monolithic type; radar; sinewave output; square-wave output; triangle-wave outputs; Channel spacing; Circuit synthesis; Circuit testing; Clocks; Digital-analog conversion; Electronic warfare; Frequency synthesizers; Phase locked loops; Radar applications; Transistors;
Journal_Title :
Solid-State Circuits, IEEE Journal of
