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A Bandgap Reference and Over Temperature Protection Circuit Designed for TCXO Chip
This article designed a bandgap voltage reference source with a low temperature drift, high power supply rejection ratio for the TCXO chips , and design the sensitive reaction of thermal protection circuit is used to protect TCXO chips. The structure of self-biased currentsource and differential operational amplifier is used in thebandgap reference, And the over temperature protectioncircuit controlled oscillator on or off by a NPN transistorto detection the circuit current.The simulation results show that the range of the voltageoutput is not more than 0.78 mV when the temperaturechanges at -40 to 125, The power supply rejection ratio inthe circuit is as high as 95dB; the oscillator is turned offWhen the temperature is greater than 150 degrees,and it'srestart when the temperature is less than 130 degrees, andit turn off needs less than 0.071 S, restart needs less than0.064 S. The circuit can provide a stable reference andgood temperature protection effect, which has greatpractical value for the TCXO chip.
A Bandgap Reference and Over Temperature Protection Circuit Designed for TCXO Chip
This article designed a bandgap voltage reference source with a low temperature drift, high power supply rejection ratio for the TCXO chips , and design the sensitive reaction of thermal protection circuit is used to protect TCXO chips. The structure of self-biased currentsource and differential operational amplifier is used in thebandgap reference, And the over temperature protectioncircuit controlled oscillator on or off by a NPN transistorto detection the circuit current.The simulation results show that the range of the voltageoutput is not more than 0.78 mV when the temperaturechanges at -40 to 125, The power supply rejection ratio inthe circuit is as high as 95dB; the oscillator is turned offWhen the temperature is greater than 150 degrees,and it'srestart when the temperature is less than 130 degrees, andit turn off needs less than 0.071 S, restart needs less than0.064 S. The circuit can provide a stable reference andgood temperature protection effect, which has greatpractical value for the TCXO chip.
A Bandgap Reference and Over Temperature Protection Circuit Designed for TCXO Chip
Chuanwu, Tan (Autor:in) / Zhicheng, Liu (Autor:in) / Qianhe, Yan (Autor:in)
01.12.2015
358081 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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