Temperature compensation type quartz oscillator

Claim 2

A temperature compensation type quarts oscillator comprising: quartz oscillation means, temperature compensation control means connected between one terminal of the quartz oscillation means and a power supply; temperature compensation voltage generation means connected to a control terminal of the temperature compensation control means; and an external voltage input terminal connected to a control terminal of the external frequency control means, wherein the temperature compensation control means is constituted by connecting a variable capacitor for temperature compensation and a voltage controlled variable resistor for temperature compensation in series between one terminal of the quartz oscillation means and the power supply, the external frequency control means is constituted by connecting a fixed capacitor for external frequency control and a voltage controlled variable resistor for external frequency control in series between another terminal of the quartz oscillation means and the power supply, the temperature compensation voltage generation means outputs an output voltage of a voltage output type D/A converter as a temperature compensation voltage and applies the temperature compensation voltage to a control terminal of the temperature compensation variable resistor, and voltage input through the external input terminal is applied to a control terminal of the external frequency control variable resistor.

Claim 3

A temperature compensation type quartz oscillator according to claim 1, wherein the temperature compensation variable capacitor incorporated in the temperature compensation control means is a temperature compensation variable MOS capacitor, the temperature compensation variable resistor incorporated in the temperature compensation control means is a temperature compensation variable MOS resistor, the external frequency control variable resistor incorporated in the external frequency control means is an external frequency control variable MOS resistor, the temperature compensation voltage generated by the temperature compensation voltage generation means is applied to a control terminal of the temperature compensation variable MOS resistor, and voltage input through the external voltage input terminal is applied to a control terminal of the external frequency control variable MOS resistor.

Claim 4

A temperature compensation type quartz oscillator comprising: quartz oscillation means; temperature compensation control means connected between one terminal of the quartz oscillation means and a power supply; temperature compensation voltage generation means connected to a control terminal of the temperature compensation control means; and an external voltage input terminal connected to a control terminal of the external frequency control means, wherein the temperature compensation control means is constituted by connecting a variable capacitor for temperature compensation and a voltage controlled variable resistor for temperature compensation in series between one terminal of the quartz oscillation means and the power supply, the external frequency control means is constituted by connecting a variable capacitor for external frequency control and a voltage controlled variable resistor for external frequency control in series between another terminal of the quartz oscillation means and the power supply, the temperature compensation voltage generation means outputs an output voltage of a voltage output type D/A converter as a temperature compensation voltage and applies the temperature compensation voltage to a control terminal of the temperature compensation variable resistor, and voltage input through the external voltage input terminal is applied to a control terminal of the external frequency control variable resistor.

Claim 5

A temperature compensation type quartz oscillator comprising: quartz oscillation means; temperature compensation control means connected between one terminal of the quartz oscillation means and a power supply; temperature compensation voltage generation means connected to a control terminal of the temperature compensation control means; and an external voltage input terminal connected to a control terminal of the external frequency control means, wherein the temperature compensation control means is constituted by connecting a variable capacitor for temperature compensation and a voltage controlled variable resistor for temperature compensation in series between one terminal of the quartz oscillation means and the power supply, the external frequency control means is constituted by connecting a variable capacitor for external frequency control and a voltage controlled variable resistor for external frequency control in series between another terminal of the quartz oscillation means and the power supply, the temperature compensation voltage generation means outputs an output voltage of a voltage output type D/A converter as a temperature compensation voltage and applies the temperature compensation voltage to a control terminal of the temperature compensation variable resistor, and voltage input through the external voltage input terminal is applied to a control terminal of the external frequency control variable resistor.

Claim 6

A temperature compensation type quartz oscillator according to claim 3, wherein the temperature compensation variable capacitor incorporated in the temperature compensation control means is a temperature compensation variable MOS capacitor, the temperature compensation variable resistor incorporated in the temperature compensation control means is a temperature compensation variable MOS resistor, the external frequency control variable capacitor incorporated in the external frequency control means is an external frequency control variable MOS capacitor, the external frequency control variable resistor incorporated in the external frequency control means is an external frequency control variable MOS resistor, the temperature compensation voltage generated by the temperature compensation voltage generation means is applied to a control terminal of the temperature compensation variable MOS resistor, and voltage input through the external voltage input terminal is applied to a control terminal of the external frequency control variable MOS resistor.

Claim 7

A temperature compensation type quartz oscillator comprising: quartz oscillation means; temperature compensation control means constituted by connecting a direct current blocking capacitor for temperature compensation and a variable capacitor for temperature compensation in series between one terminal of the quartz oscillation means and a power supply; external frequency control means constituted by connecting a direct current blocking capacitor for external frequency control and a variable capacitor for external frequency control in series between another terminal of the quartz oscillation means and the power supply; temperature compensation voltage generation means which outputs an output voltage of a voltage output type D/A converter as a temperature compensation voltage and has its output terminal connected through a fixed resistor for temperature compensation to a connection point between the temperature compensation direct current blocking capacitor and the temperature compensation variable capacitor; and an external voltage input terminal connected through a fixed resistor for external frequency control to a connection point between the external frequency control direct current blocking capacitor and the external frequency control variable capacitor.

Claim 8

A temperature compensation type quartz oscillator comprising: quartz oscillation means; temperature compensation control means constituted by connecting a direct current blocking capacitor for temperature compensation and a variable capacitor for temperature compensation in series between one terminal of the quartz oscillation means and a power supply; external frequency control means constituted by connecting a direct current blocking capacitor for external frequency control and a variable capacitor for external frequency control in series between another terminal of the quartz oscillation means and the power supply; temperature compensation voltage generation means which outputs an output voltage of a voltage output type D/A converter as a temperature compensation voltage and has its output terminal connected through a fixed resistor for temperature compensation to a connection point between the temperature compensation direct current blocking capacitor and the temperature compensation variable capacitor; and an external voltage input terminal connected through a fixed resistor for external frequency control to a connection point between the external frequency control direct current blocking capacitor and the external frequency control variable capacitor.

Claim 9

A temperature compensation type quartz oscillator according to claim 5, wherein the temperature compensation direct current blocking capacitor incorporated in the temperature compensation control means is a temperature compensation direct current blocking capacitor formed of two layers of polycrystalline silicon film containing high-concentration impurity, the temperature compensation variable capacitor incorporated in the temperature compensation control means is a temperature compensation variable MOS capacitor, the external frequency control direct current blocking capacitor incorporated in the external frequency control means is an external frequency control direct current blocking capacitor formed of two layers of polycrystalline silicon film containing high-concentration impurity, and the external frequency control variable capacitor incorporated in the external frequency control means is an external frequency control variable MOS capacitor.

Claim 10

A temperature compensation type quartz oscillator according to claim 5, wherein the temperature compensation direct current blocking capacitor incorporated in the temperature compensation control means is a temperature compensation direct current blocking capacitor whose counter electrode is a high-concentration diffused region, the temperature compensation variable capacitor incorporated in the temperature compensation control means is a temperature compensation variable MOS capacitor whose counter electrode is a low-concentration diffused region, the external frequency control direct current blocking capacitor incorporated in the external frequency control means is an external frequency control direct current blocking capacitor whose counter electrode is a high-concentration diffused region, and the external frequency control variable capacitor incorporated in the external frequency control means is an external frequency control variable MOS capacitor whose counter electrode is a low-concentration diffused region.

Claim 11

A temperature compensation type quartz oscillator comprising: quartz oscillation means; temperature compensation control means connected between one terminal of the quartz oscillation means and a power supply; a fixed capacitor connected between another terminal of the quartz oscillation means and the power supply; and temperature compensation voltage generation means connected to a control terminal of the temperature compensation control means.

Claim 12

A temperature compensation type quartz oscillator comprising: quartz oscillation means; temperature compensation control means connected between one terminal of the quartz oscillation means and a power supply; a fixed capacitor connected between another terminal of the quartz oscillation means and the power supply; and temperature compensation voltage generation means connected to a control terminal of the temperature compensation control means.

Claim 13

A temperature compensation type quartz oscillator according to claim 8, wherein the temperature compensation control means is constituted by connecting a variable capacitor for temperature compensation and a voltage controlled variable resistor for temperature compensation in series, and the temperature compensation voltage generation means is means which outputs the output voltage of a voltage output type D/A converter as a temperature compensation voltage and applies the temperature compensation voltage to a control terminal of the temperature compensation variable resistor.

Claim 14

A temperature compensation type quartz oscillator comprising: quartz oscillation means; temperature compensation control means constituted by connecting a temperature compensation direct current blocking capacitor and a temperature compensation variable capacitor in series between one terminal of the quartz oscillation means and a power supply; a fixed capacitor connected between another terminal of the quartz oscillation means and the power supply; and temperature compensation voltage generation means which outputs an output voltage of a voltage output type D/A converter as a temperature compensation voltage and has its output terminal connected through a temperature compensation fixed resistor to a connection point between the temperature compensation direct current blocking capacitor and the temperature compensation variable capacitor.

Claim 15

A temperature compensation type quartz oscillator comprising: quartz oscillation means; temperature compensation control means constituted by connecting a temperature compensation direct current blocking capacitor and a temperature compensation variable capacitor in series between one terminal of the quartz oscillation means and a power supply; a fixed capacitor connected between another terminal of the quartz oscillation means and the power supply; and temperature compensation voltage generation means which outputs an output voltage of a voltage output type D/A converter as a temperature compensation voltage and has its output terminal connected through a temperature compensation fixed resistor to a connection point between the temperature compensation direct current blocking capacitor and the temperature compensation variable capacitor.

Claim 16

A temperature compensation type quartz oscillator according to claim 10, wherein the temperature compensation direct current blocking capacitor incorporated in the temperature compensation control means is a temperature compensation direct current blocking capacitor formed of two layers of polycrystalline silicon film containing high-concentration impurity, the temperature compensation variable capacitor incorporated in the temperature compensation control means is a temperature compensation variable MOS capacitor, and the fixed capacitor connected between the other terminal of the quartz oscillation means and the power supply is a fixed capacitor formed of two layers of polycrystalline silicon film containing high-concentration impurity.

Claim 17

A temperature compensation type quartz oscillator according to claim 10, wherein the temperature compensation direct current blocking capacitor incorporated in the temperature compensation control means is a temperature compensation direct current blocking capacitor whose counter electrode is a high-concentration diffused region, the temperature compensation variable capacitor incorporated in the temperature compensation control means is a temperature compensation variable MOS capacitor whose counter electrode is a low-concentration diffused region, and the fixed capacitor connected between the other terminal of the quartz oscillation means and the power supply is a fixed MOS capacitor whose counter electrode is a high-concentration diffused region.