Detectors, Discriminators, & Limiters
detectors, discriminators, and limiters cover a very wide range of circuit
configurations that perform functions like demodulating communications
signal and signaling the presence of signals. Early detectors were implemented
using vacuum tubes, but of course modern versions use silicon, germanium,
GaAs, and other kinds of semiconductor compounds. Peak detectors, average
detectors, video detectors, and others are built out of anything from
standard PN junction silicon diodes to more elaborate constructions
like Schottky, Gunn, and Esaki tunnel diodes.
consist of a differentiator followed by an envelope detector, as with
an FM radio. In general, it is a device that converts a property of
an input signal, such as frequency or phase, into an amplitude variation,
depending on how the signal differs from a standard or reference signal.
Whereas a detector can be made of a single diode, resistor and capacitor,
a discriminator is usually a more complex circuit.
Limiters are designed to prevent signals from exceeding a predetermined
level, either to prevent damage to the following circuits, or to prevent
signal degradation beyond a defined amount.
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PMI's organization has been setup to Design, Develop, Manufacture, Test, and Market complex
state-of-the-art Hybrid RF MIC and MMIC Components, Supercomponents, and Subsystems.
products for applications in space, military, commercial,
and consumer electronics systems. DC to 40 GHz.
from PMI's Extensive Line
LNA, VGA, Cryogenic
• Phase Shifters
• Switch Products
• VCOs & DTOs
• Multifunction Modules
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LP, HP, BP, BR,
• I/Q Modulators
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• Power Dividers
• Quad Couplers
• DLVAs & SDLVAs
to Your Specifications
Advanced Control Components (now
Aeroflex Control Components - ACC)
| 732-460-0212 | Eatontown, NJ
Products include amplifiers,
attenuators, detectors, frequency converters, custom
integrated assemblies, limiters, phase shifters, switches,
switch matrices, synthesizers. Services include hybrid
micro-electronic assembly, wire bonding, PCB assembly,
RF and microwave test to 40GHz, product design.
Agile Microwave Technology
| 516-931-1760 | Hicksville, NY
RF amplifiers, limiters,
switches, and multipliers. Our goal is to cut product
cost by more than 50% by keeping our overhead low, by
staying small and focusing on innovative designs which
are inspired by the commercial wireless market. Our
goal is to provide same or better performance, size
and quality at a much lower cost through better engineering
and outsourcing to U.S. based contract manufacturers.
cernex.com | 408-541-9226
| Sunnyvale, CA
Amplifiers, antennas, couplers, isolators,
circulators, filters, diplexers, oscillators, noise
sources, switches, phase shifters, transition &
adapters, mixers, waveguide products, attenuators, terminations,
Cougar Components (now Teledyne
Cougar) | cougarcorp.com | 408-522-3838 | Sunnyvale,
RF and microwave cascadable amplifiers and subsystems
in 100 kHz to 12 GHz range. Detectors, limiters, limiting
amplifiers, attenuators, AGC amplifiers, oscillators
herotek.com | 408-941-8399
| San Jose, CA
GaAs FET amplifiers, low-noise, small
signal & power 0.01 to 50 GHz, limiters, detectors,
switches, harmonic generators.
For over 25 years we have manufactured precision
microwave attenuators, terminations, and other components, and now
diode detectors for commercial, military, and space applications.
Res-Net Microwave is a leader in the development and production of the metal films required for these types of RF/microwave
attenuators, terminations, and resistors up to 2 kW.
A Sample of Our Product Line
- Coaxial, Stripline, High Power Flange
- Disc, Microwave Carbon Film Rod,
Coaxial Rod, High Power Flange
- SMA, N, Chip, High Power Flange
- Zero-Bias Schottky Diode
program to ANSI/NCSL Z 540, MIL-STD-790, ISO 9001:2008 and NASA Specification NPC 200-3. Calibration to MIL-STD-45662
|In-house photo etch and laser trim capabilities.
Large choice of substrate materials.
Micronetics (now Mercury Systems)
603-883-2900 | Hudson, NH
equipment, noise sources, voltage controlled oscillators,
switches, limiters, phase shifters, attenuators.
| 301-662-5019 | Frederick, MD
log video amplifiers, detectors, limiters, log amps,
frequency discriminators, threshold detectors and receiver
front-ends, phase shifters, digital control, fixed attenuators,
Radar Technology, Inc
| 978-346-9775 | Merrimac, MA
Log, linear amplifiers,
FM discriminators, IF limiters.
radiall.com | 203-380-9800
| Stratford, CT
Antennas, attenuators, couplers,
DC blocks, detectors, fiber optic components, phase
shifters, surge protectors, terminations, coaxial adapters,
Specialist Microwave Solutions Ltd
smslimited.co.uk | 01234 756034 | UK
a wide range of custom control devices based on Silicon
PIN diode and GaAs MMIC technology, develops custom
circuitry to specifications repairs 3rd-party components,
offers PIN and GaAs FET switches, attenuators, amplifiers,
oscillators, limiters, phase shifters, switched filter
banks, & multi function assemblies.
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