A TCXO is usually a crystal oscillator that contains a temperature-sensitive reactive circuit in its oscillation loop that compensates for inherent temperature versions that come about whenever a crystal oscillator is in use. Thermistor Compensation: TCXOs could involve a temperature sensitive resistor that's a thermistor to evaluate the environmental temperature https://tcxooscillators48259.answerblogs.com/31165548/details-fiction-and-tcxo-manufacturer