Products/Services for Varicap FM Modulator
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QPSK Modulators and BPSK Modulators - (24 companies)Quadrature phase shift keying (QPSK) modulators and binary phase shift keying (BPSK) modulators are used to change certain characteristics (amplitude, frequency or phase) of a carrier signal in order to transmit information. The changes...PSK Modulator TypePackage Type -
Electro-Optic Modulators - (38 companies)Electro-optic modulators are analog or digital devices that use an electric field to alter the characteristics (e.g., band gap and index of refraction) of a material through which light is traveling, changing the characteristics of the light itself... -
I/Q Modulators and I/Q Demodulators - (91 companies)I/Q modulators and I/Q demodulators change the amplitude, frequency, or phase of a carrier signal in order to transmit information. I/Q modulators split an incoming data stream into its in-phase (I) and quadrature (Q) components, mix the resulting... -
Acousto-Optic Modulators - (18 companies)Acousto-optic modulators are devices that use sound waves to modify the amplitude, frequency, or phase of light passing through an acousto-optic material. For materials with a fixed acoustic velocity, the acoustic wavelength is a function... -
RF Transmitters - (313 companies)RF transmitters are electronic devices consisting of an oscillator, modulator, and other circuits that produce an RF signal. An RF transmitter is a device that creates a radio signal containing information that with the use of an antenna propagates... -
Radio Receiver ICs - (59 companies)Radio receiver ICs support worldwide radio band requirements, including frequency modulation (FM), FM radio data system (RDS), amplitude modulation (AM), long wave (LW), short wave (SW), and weather bands. These integrated circuits (ICs...
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RF Transceivers - (490 companies)...the desired information content. Frequency modulation (FM) causes the instantaneous frequency of a sine wave carrier to depart from the center frequency by an amount proportional to the instantaneous value of the modulating signal. On-off key (OOK...
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Wireless Modems - (525 companies)How to Select Wireless Modems. Image Credit: Banner Engineering Corp. and AvaLAN Wireless Systems, Inc. Wireless modems transmit modulated data using electromagnetic waves. They connect to a wireless network instead of to a telephone line. Unlike...
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Varactor Diodes - (73 companies)...varactor diode can vary from 60 pf at zero bias to 15 pf at 20 V. With careful manufacturing, however, the capacitance range can be increased to ten-to-one. Varactor diodes, which are sometimes referred to as varicap diodes, are used in electronic...
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Radio Transmitter ICs - (32 companies)...antenna. There are many different types of radio transmitter ICs. FM devices use frequency modulation (FM), a technique that causes the instantaneous frequency of a sine-wave carrier to depart from the center frequency by an amount proportional...
Product News
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Parker Sporlan Division
Modulating Three Way Valve The Parker Sporlan Modulating 3-Way (MTW) valve allows control of refrigerant flow through two outlet ports. Two valve pistons are attached to a connecting rod and also to the stepper motor. As the MTW valve modulates, one port opens and the other port closes. The movement of the valve pistons relative to the two ports is inversely proportional. The MTW is constructed from a forged brass body for durable field operation, and uses a high quality 42 mm stepper motor. Features/Benefits: * Improved... (read more)Browse Control Valves Datasheets for Parker Sporlan Division -
ODG (Origin Data Global)
HDMI Modulator: Definition & Features Understanding HDMI ModulatorsWhat are HDMI Modulators?. An HDMI modulator is a device that receives a high definition multimedia interface (HDMI) signal and modulates it into a radio frequency (RF) signal. The modulation is important because of how RF signals can be distributed over coaxial cables, enabling the distribution of HD content to various locations using coaxial cables. An HDMI modulator can be thought of as a translator, as it takes the language of HDMI and speaks in coaxial cable... (read more)Browse Drive Sockets and Adapters Datasheets for ODG (Origin Data Global) -
CASTECH, Inc.
High-Precision Photoelastic Modulators Engineers working on optical systems often face polarization drift, limited modulation speed, and signal instability. Traditional modulators may not provide the accuracy or responsiveness required for modern quantum sensing and spectroscopy setups, leading to measurement errors and reduced system performance. These photoelastic modulators are built for demanding optical applications. * High phase precision supports accurate polarization control. * High modulation frequencies enable real-time... (read more)Browse Laser Processing Equipment Datasheets for CASTECH, Inc. -
CASTECH, Inc.
50kHz Photoelastic Modulators for Polarization High-Speed Photoelastic Modulators for Polarization Control. Precise polarization control is critical in advanced optical experiments and measurement systems. Traditional modulators may struggle to provide sufficient speed, accuracy, or wavelength flexibility, limiting experimental precision and measurement reliability. CASTECH photoelastic modulators (PEMs) provide high-speed polarization modulation at 50 kHz, enabling accurate and stable optical measurements across a wide spectral range... (read more)Browse Laser Optics, Heads, and Beam Delivery Components Datasheets for CASTECH, Inc. -
CASTECH, Inc.
Photoelastic Modulators for Precision Optics CASTECH photoelastic modulators (PEMs) are designed for dynamic polarization control in advanced optical systems. Based on the photoelastic effect, they enable precise phase retardation and stable modulation performance across a wide wavelength range. Core Engineering Advantages. High precision phase modulation for accurate polarization control. Wide wavelength compatibility from UV to infrared. High modulation frequency for real-time optical measurement. Large aperture and acceptance angle... (read more)Browse Laser Processing Equipment Datasheets for CASTECH, Inc. -
United Electric Controls Company
FM certified explosion-proof temperature sensors UE 's Applied Sensor Technologies division is adding three FM certified explosion-proof styles to its temperature sensor portfolio. The styles are available as a 100 O RTD or mineral insulated thermocouple. FM certification for hazardous areas applies to the complete assembly - both sensor and terminal head. This is an important distinction since common practice has been to pair an explosion proof rated terminal head with an unrated RTD or thermocouple, assuming suitability for hazardous... (read more)Browse RTD Temperature Transmitters Datasheets for United Electric Controls Company -
Assured Automation
FM Fire-Safe Thermal Shutoff Ball Valves Assured Automation's FM Fire-Safe Thermal & Electro-Thermal ball & butterfly valve assemblies these valves are suitable for flammable gas or liquid applications. The thermal links, which respond to temperature changes, automatically close or open the valve at specific trigger temperatures. Additionally, a manual lever or gear operator is available to operate the valve manually without interfering with the fusible link. Assured Automation makes it easy to configure the FM FIre-Safe Shutoff... (read more) -
CASTECH, Inc.
High-Speed A-O Modulators In laser-based systems, slow modulation, imprecise intensity control, and process variability can reduce accuracy and efficiency, particularly in photolithography, medical treatments, and high-precision material processing. Engineered for speed and reliability, these modulators offer: High-speed modulation up to 300?MHz with rise/fall times as low as 6?ns for rapid laser adjustments. Customizable parameters including wavelength, power, beam diameter, modulation speed, and extinction ratio... (read more)Browse Acousto-Optic Modulators Datasheets for CASTECH, Inc. -
CRYSTECH, Inc.
Durable KD*P Laser Modulator Optimize high-power laser systems with the Durable KD*P Laser Modulator. Engineered for stability, high damage threshold, and precise polarization control, it ensures reliable performance in demanding industrial, medical, aesthetic, and military laser applications. Key Features: High Damage Threshold: 1?GW/cm ^2 for robust operation under intense laser power. Precise Polarization Control: Extinction ratios over 2000:1 (CP) and 1500:1 (PP). Low Insertion Loss: Maintains system efficiency... (read more)Browse Laser Optics, Heads, and Beam Delivery Components Datasheets for CRYSTECH, Inc. -
MSA Safety
Senscient ELDS FM Approved Open Path Gas Detector The new Senscient ELDS TM methane open path gas detector has obtained Factory Mutual (FM) approval for use in hazardous areas including the stringent FM open path, combustible gas performance approval (FM 6325). It meets the demanding requirements of the oil and gas industry whether that be on or offshore including gas distribution facilities. A 0-1 LFL.m measuring range offers faster speed of response and initiation of executive actions than any other open path, flammable gas detector... (read more)Browse Gas Instruments Datasheets for MSA Safety
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Electronics from the Ground Up: Learn by Hacking, Designing, and Inventing > Frequency Modulation Signals and Circuits
For example, the FM modulator circuits using varactor or varicap diodes are voltage-controlled oscillators (see Figure 11-2).
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Development of the physical principles of the design and implementation of a 500–700 GHz spectrometer with a superconducting integrated receiver
FM modulator FPD IF amplifier Harmonic mixer Gunn generator with varicap Frequency multiplier Output .
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Wireless Communication Electronics
11.3.3.1 Reactance Modulator The main disadvantage of varicap -based FM circuits is their narrow tuning range, which is due to the diode’s very narrow small-signal operational zone.
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Special features of practical measurement of parameters of promisisng frequency-modulated short-range millimeter radars
… Doppler effect influence on PAM parameters under frequency modulation of a probing signal using different FM approaches. These challenges prompted us to design and debug a prototype including a high-frequency unit (an autodyne based on a Gunn-effect diode, a varicap , and an antenna) and a signal … … analog signal processing unit (ASPU), a modulator , a digital signal processing …
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Research of low-frequency model of a low noise microwave frequency (phase) detector
The FM voltage with frequency 600 kHz arrives to the base, while the modulating voltage with frequency … The phase modulator is a transistor resonant amplifier with the attached varicap , to which the modulating voltage from the low frequency generator LFG with frequency 40 Hz is fed through the separating capasitor, and the emitter repeater.
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Distortion in Varicap FM Oscillators
NPR dtLe to distortion in 70-MHz FM varicap oscillator. Briefly, the NPRof an FA4 modulator can be measured by modulating with a bandlimited Gaussian signal and …
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Super Wide Deviation Phase Modulator
The problem may be viewed as similar to that of controlling LO incidental FM in a high-quality varicap -type FM tuner. Distortion in the modulator is limited by distortion in the VCO and by variations, in delay as …
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An analysis of the autodyne effect of oscillators with linear frequency modulation
However, an inclusion of such circuit modulators into the oscillator hybrid-integral circuitry improves significantly the system … In view of the above, here we would like, when deriving general expressions for the autodyne response in the case of arbitrary FM of the oscillator, to address both types of modulation: using the varicap voltage variation and by changing the bias.
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Packet Radio in the Amateur Service
FSK can be generated by injecting filtered transmit data directly into an FM modulator , bypassing the audio cir- cuitry. … modula- tors, it is often necessary to add a variable-capacitance diode (“ varicap ”) to the …
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Distortion in Varicap FM Oscillators
Distortion in Varicap FM Oscillators Voltagecontrolled oscillators (VCOs), used both as modulators and demodulators, may be a major source of distortion.
