Sciteq family of Synthesizer Products

Meret Optical with over 20 years of experience, is a world leader in frequency synthesizer products using both Direct Digital Synthesis and Fractional Phase Lock Loop technologies.

DDS and Chirp Synthesizers

ADS 53x
Low cost and compact, the ADS 53x direct digital synthesizers (DDS)combine high speed, quadrature output, modest power, and broad bandwidth into products that are easy to integrate into your system.


ADS 63x
The ADS-63x uses GaAs devices to achieve high bandwidth and spectral purity. Spur performance of the ADS-63x synthesizers is guaranteed.


DCP-1
The DCP-1 direct digital chirp synthesizer can produce linear FM waveforms over a broad frequency range, with an exceptional update rate. Operating with a 500 MHz clock, the DCP-1 can synthesize a new frequency every two nanoseconds.

DDS Fractional PLL Synthesizers

SEI - 1618 E B00

The SEI-1618EB evaluation card was designed to demonstrate ALL™ (fractional) technology. The ALL™ is a patented fractional PLL circuit, and is fully programmable — i.e., both the counters and the fractionality.

SEI 1618 PG

The SEI-1618PG is a Phase Lock Loop (PLL) chip designed to provide frequency control in a PLL at fractional multiples of the reference frequency.

SEI 602

SEI-602 is a GaAs accumulator with 32 bits of frequency resolution, 4 bits of phase control, and 14-bit output. Maximum clock rate is less than 1 GHz, with power dissipation of ~4.5 W

SEI 603

SEI-603 is a GaAs sine ROM that converts 14 bits of phase data to 12 bits of amplitude data in ~3Kof memory, using a patented Sciteq algorithm. Maximum full temperature clock rate is 650 MHz, with power dissipation of ~4.5 W.

Static Prescalers
The SEI-12XX family of low cost, high-speed GaAs dividers can operate at frequencies up to 14 GHz.

VDS-1306
The VDS-1306 combines a patented, pure decimal direct digital synthesizer (DDS) with an advanced phase-locked loop (PLL) circuit. The standard version covers 70±15 MHz, making it ideal as a local oscillator (LO) in radio and SATCOM applications.

VDS-2700
The low cost 2700 series combines a fractional -n PLL with DDS to achieve very fine steps and excellent phase noise. The small module and simple interfaces make system integration easy.

VDS-6000
Covering several bands in RF to low microwave, low cost VDS-6000 synthesizers use a patented fractional-n technique called Arithmetically Locked Loop (ALL), to achieve substantially better phase noise with single loop simplicity.

VDS-6030
To achieve single-loop simplicity and excellent phase noise, the VDS-6030 synthesizer uses a patented fractional -n technique called "Arithmetically Locked Loop" (ALL), followed by a microwave tripler.

VDS-6600
The VDS-6600 is the next generation of the VDS-6000 family, incorporating our PLL IC and SEI-1618PG, and is available with either serial or parallel control.

VDS-9x00
The low cost VDS-9x00 synthesizers are efficient and reliable. The 9100 covers a narrow band with very high performance, while the 9200 trades bandwidth for spectral purity.