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This section provides an overview for low frequency module oscillators as well as their applications and principles. Also, please take a look at the list of 2 low frequency module oscillator manufacturers and their company rankings.
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A low frequency module oscillator is a device that generates a relatively low frequency signal.
The definition of the term "low frequency" itself varies depending on the field in which it is used. However, the specifications of low frequency module oscillators sold in the market range from a few Hz to several hundred kHz. Oscillator circuits can be used to generate AC signals of specific frequencies, and are generally used to generate reference signals for testing using frequency signals.
Signals in the range of approximately 20Hz to 20kHz that can be produced by oscillators are in the audible range and can be heard by humans as sound when amplified.
The most common use of low frequency module oscillators is to analyze the frequency response of audio equipment. Since most electronic devices that use frequency signals for communication use radio frequency (RF), and the familiar low frequency is sound waves, acoustic devices are the most common circuits that use low-frequency signals.
For example, an audio amplifier is used as a DUT (Device under test), and the input signal is generated by a low frequency module oscillator. By analyzing the output signal with an FFT analyzer, it is possible to assess the characteristics of the amplifier under test.
The principle of the low frequency module oscillator lies in the technology of generating a stable frequency signal based on an oscillator circuit. Since it is difficult to realize low-frequency waveforms with the well-known Hartley or Colpitts type oscillator circuits based on LC resonant circuits due to wavelength limitations, RC (or CR)-type oscillator circuits are used.
RC-type oscillators include Wien bridge circuits, bridged T-type circuits, and state-variable-type circuits, all of which can achieve oscillation by adjusting the amount of amplifier feedback. Of these, the Wien bridge circuit is the most well-known and widely used, partly due to its simplicity of having only one amplifier in the circuit.
On the other hand, the state-variable-type provides lower distortion and two-phase output. A variable resistor or a variable capacitor called a varicap may be used to control the frequency. Step-variable with capacitors and fixed resistors is another example of a frequency determination technique.
An RC oscillation circuit alone cannot produce a sine wave with a constant amplitude. Therefore, a device to control the amplitude is usually required. There are methods such as using an element whose resistance changes with the applied voltage, such as a light bulb or thermistor, to adjust the feedback amount, or assembling an electronic circuit that detects the voltage at the output to adjust the feedback amount.
Low frequency module oscillators are relatively familiar electronic circuits, and the resulting devices can be used to create buzzers for home use, for example. For this reason, they are widely used in home-built electronic circuit kits and as educational materials for students learning electronic circuits.
Free software (e.g., WaveGene) that can generate low-frequency sound sources on Windows PCs is also widely available.
In general, the frequency accuracy of RC oscillators is not as good as that of crystal (quartz) or ceramic oscillators. This is due to variations in resistance and capacitance values, as well as changes in the RC value depending on temperature.
However, compared to crystal (quartz) oscillators, RC oscillators are relatively inexpensive and easy to configure. As a result, they are widely used, and there have been some innovations to improve the accuracy of RC oscillators. A typical method for improving accuracy is calibration. Calibration is a widely used method that utilizes digital circuits, and frequency values are adjusted by calibration especially before shipment.
Calibration using digital circuits is based on a method that compares the frequency with an internal clock and corrects it. For example, a certain value of a memory address is commonly used for calibration purposes. This can be done by changing the value of a register called OSCCAL in the operation of the digital circuit, and automatically selecting the register value that will result in the desired oscillation frequency.
*Including some distributors, etc.
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River Eletec Corp. is a manufacturer of quartz crystal devices and resistors that was originally founded in Yamanashi, Japan as River Electronics Co. Ltd. in 1967 before rebranding in 2004. The company primarily produces quartz units for generating or stabilizing frequencies for electronic circuitry, surface mount device (SMD) resistors for voltage limitation, and crystal oscillators. It also offers array microphones for capturing sound from multiple directions, and crystal filters for signal selection. The company’s products are used mainly by clients in the communication, defense, and consumer electronics industries.
Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
Japan
|
2 | 100.0% |
76 products found
76 products
S. workman-. Japan
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■ Characteristics ･ Frequency is 900kHz oscillator. Two heated heads can be connected and 2 heads can be heated. ･ The display is digital and vario...
3 models listed
S. workman-. Japan
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Very Fast Response
■ Features -The frequency is 375-575kHz (due to load) 2 head heating connection ･ The feature is that if you want to deepen your enthusiasm than th...
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S. workman-. Japan
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Very Fast Response
The frequency is 50kHz for the 50 series and 200kHz for the 200 series. The output is from 6 kw to 48 kW, mainly for heating of relatively large it...
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S. workman-. Japan
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Very Fast Response
The SA/80 series newly released in 2013 has a frequency from 25kHz to 100kHz. The output is from 25 kw to 150 kW, mainly for heating of relatively ...
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S. workman-. Japan
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The SA/400 series, which was newly released in 2020, has a frequency from 100kHz to 400kHz. The output is 12.5 kW and 250 kW, mainly suitable for h...
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RIVER ELETEC CORPORATION
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1612 size MHz band crystal oscillator ■Features ・1612 size CMOS crystal oscillator (3 MHz to 80 MHz) ・Frequency tolerance ±7 ppm (@25 ℃) availab...
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Cons Technology Co., Ltd.
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Standard Response
PRS10 is a small, lightweight, reasonable built -in oscillator. Ideal for next -generation communication equipment, broadcasting equipment, transmi...
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Naka & Company has a lineup of highly stable OCXOs for industrial equipment and fixed communications.
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Naka & Company has a lineup of highly stable OCXOs for industrial equipment and fixed communications.
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Naka & Company has a lineup of highly stable OCXOs for industrial equipment and fixed communications.
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Naka & Company has a lineup of highly stable OCXOs for industrial equipment and fixed communications.
JEL SYSTEM CO,LTD.
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Standard Response
Naka & Company has a lineup of highly stable OCXOs for industrial equipment and fixed communications.
JEL SYSTEM CO,LTD.
70+ people viewing
Standard Response
Naka & Company has a lineup of highly stable OCXOs for industrial equipment and fixed communications.
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Standard Response
Naka & Company has a lineup of highly stable OCXOs for industrial equipment and fixed communications.
KYUSHU DENTSU COMPANY LIMITED
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Standard Response
■Features ・5.0×3.2mm size temperature compensated crystal oscillator ・Clipped sine wave & CMOS output ・High precision TCXO
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JEL SYSTEM CO,LTD.
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Naka & Company has a lineup of highly stable OCXOs for industrial equipment and fixed communications.
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■Features ・7.5×5.0mm size crystal oscillator ・32.768kHz kHz band ・CMOS output
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Naka & Company has a lineup of highly stable OCXOs for industrial equipment and fixed communications.
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Fujicom Co., Ltd.
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■Applications ・Communication base station ・Digital switching measuring instrument ·synthesizer ■Features ・AT, SC cut ・Low aging, compact package
Naka and Company Co., Ltd.
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Enhance your cleaning power even more. In order to improve and stabilize quality, we adopted a fundamental frequency sweep type wide-area simultane...
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Naka and Company Co., Ltd.
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Enhance your cleaning power even more. Eliminates 40KHz dissatisfaction. In order to improve and stabilize quality, we adopted a fundamental freque...
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Naka and Company Co., Ltd.
60+ people viewing
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■Summary Naka & Company has a lineup of highly stable OCXOs for industrial equipment and fixed communications.
