Temperature_compensated_crystal_oscillator_Circuit Diagram World 
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2016-08-31 00:47  
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This circuit uses an LTC1043 to differentiate between a temperature-sensing network and a dc reference. The singla-ended output biases a varactortuned crystal oscillator to compensate drift. The varactor-crystal network has high dc impedance, with eliminates the need for an output amplifier from the LTC1043. Connect other LTC1043 pins as follows: 4 to +5 V, 16 to ground through a 0.001-μF capacitor, and 17 directly to ground. Linear Technology, Linear Applications Handbook, 1990, p. AN3-15.