| A crystal oscillator, which consists of a crystal units and an inverting amplifier, outputs a stable frequency when subjected to a specific voltage. Crystal oscillators are employeed as a simple means of providing clock generators used for information processing in office automation and other electronic equipment. |
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| Temperature Compensated Crystal Oscillators (TCXO) |
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| A temperature compensated crystal oscillators, or TCXO, compensates frequency-temperature characteristics of crystal units using a temperature compensation circuit, to give a highly stable output frequency. They are mainly used as reference signal sources in radio frequency circuits of cellular phones. |
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| Voltage Controlled Crystal Oscillators (VCXO) |
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| Oscillators in which output frequency can be varied using an external control voltage. |
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| Digital Temperature Compensated Crystal Oscillators (DTCXO) |
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| Oscillators in which the voltage applied to a VCXO is controlled using a voltage control circuit and temperature is digitally compensated to give high stability of oscillation frequency. |
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| Oven Temperature Compensated Crystal Oscillators (OCXO) |
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| Oscillators in which the temperature of components with a major impact on temperature is controlled by a constant temperature oven to give high stability of oscillation frequency. |
| Crystal Oscillator Applications |
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| Clock oscillators |
TCXO |
VCXO / DTCXO / OCXO
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· Cellular phones |
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Base stations for cellular phones |
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Broadcasting stations / Transmission sites |
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Optical transmission systems |
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Measuring equipment |
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| Structure and Characteristics |
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 Frequency Stability Range of Crystal Oscillators |
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Circuit Diagram of Clock Oscillators (SPXO) |
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Temperature Characteristics of TCXO |
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| Circuit Diagram of Voltage Controlled Crystal Oscillators (VCXO) |
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Circuit Diagram of Digital Temperature Compensated Crystal Oscillators (DTCXO) |
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| Related Infomation |
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| Products |
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