Microwave Systems Solutions

Phase Shifters: Discriminators & Translators

Discriminators

Olektron Frequency discriminators are utilized to convert an input signal frequency to a DC voltage that is proportional to the input frequency. Applications are: frequency measurement, FM demodulation and automatic frequency control (AFC) We offer two different design types.

The first is formed utilizing two L-C resonant circuits tuned to staggered frequencies The skirts of these filters form the frequency selective element which, when followed by amplitude detection, provides a varying signal level with input frequency. We also offer design delay line discriminators. These use the principal of delay time in transmission lines to provide detection. A phase sensitive detector is used to provide the conversion from RF to DC voltage signals. Both models of discriminators incorporate internal limiting IF amplifiers, and video amplifiers. This approach removes small variations in the input signal level and provides convenient +/- 2.5 volt (nominal) output voltage swing. (A large variety of custom and standard designs are available.)

Our mixer products operate up to 3 GHz with both narrow and wideband performance. They are available with unbalanced or dual IF outputs and LO drives from ­3 to +23 dBm. Starved LO models are also available. Custom packaging, including commercial SMT, is optional. (A large variety of custom and standard designs are available.)

Standard Models

To view individual products, click the model number.

Discriminator Selection Guide

MODEL NUMBER	DESCRIPTION	FREQUENCY RANGE
HCF-4-9021	Frequency Discriminator	140 to 180 MHz
MCF-4-9032	Miniature Frequency Discriminator	140 to 180 MHz
HCF-5-9023	1 GHz Wideband Frequency Discriminator	750 to 1250 MHz
HCDF-4-9032	Digital Frequency Discriminator	135 to 185 MHz

Additional Information

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