JP2011188314A - Oscillation circuit with pulse generation circuit for oscillation start - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oscillation circuit with a pulse generation circuit for oscillation start, the oscillation circuit having shortened start time, having low power consumption at the start, and oscillating an oscillator having comparatively large crystal impedance. <P>SOLUTION: The oscillation circuit 1 with the pulse generation circuit for oscillation start includes an oscillation circuit 2 which has a circuit in which a plurality of oscillation circuit side circuit elements (inverters or buffers) connected in series and an oscillator Y1 are connected in parallel with each other; and the pulse generation circuit 3 for oscillation start that has a three-state inverter IC 11, and a signal generation part which is connected to an input terminal and a control terminal of the three-state inverter IC 11, and which generates a first signal to be transmitted to the input terminal and a second signal to be transmitted to the control terminal and having time to reach a threshold level of the three-state inverter slower than that of the first signal, and that outputs a pulse for oscillation start from the three-state inverter IC 11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an oscillation circuit with an oscillation starting pulse generation circuit.

In an electronic device, for example, a mobile phone, a crystal oscillator used as a reference oscillation source is intermittently operated so as to be able to be used continuously for a long time to reduce power consumption. In such a crystal oscillator that operates intermittently, it is desired that the time required from the start of driving to the oscillation of a desired output signal is short.
The crystal oscillator starts to oscillate when the power is turned on, and the amplitude of the output signal is gradually increased to be in a stable oscillation state. In this case, the time from when the power is turned on until the start of oscillation is called “start-up time”, and the time from when the oscillation starts until the amplitude of the output signal reaches a predetermined value (level) is called “rise time”. .

  Incidentally, as a conventional technique for shortening the startup time of the piezoelectric oscillator, Patent Document 1 discloses a piezoelectric oscillator including a piezoelectric vibrator, an amplifier circuit, and a high-speed startup circuit. The high-speed startup circuit has an NPN transistor and a capacitor. The NPN transistor is connected in the forward direction between the power supply voltage Vcc line and one end of the piezoelectric vibrator, and the capacitor has a power supply voltage Vcc. Connected between the line and the base of the NPN transistor. In this piezoelectric oscillator, the base current flows through the NPN transistor for a predetermined time after the power supply voltage Vcc is turned on until the accumulation of the electric charge in the capacitor is completed, and the NPN transistor is turned on via the NPN transistor. Thus, the activation promoting voltage is applied to the piezoelectric vibrator from the power supply voltage Vcc line. This shortens the startup time of the piezoelectric oscillator.

However, in the piezoelectric oscillator described in Patent Document 1, since a base current flows through the NPN transistor when the activation promoting voltage is applied to the piezoelectric vibrator, there is a disadvantage that the power consumption is greatly increased. is there.
In addition, the oscillation circuit of the piezoelectric oscillator described in Patent Document 1 is based on the assumption that a thickness-sliding vibrator (AT-cut quartz vibrator) having a crystal impedance (CI value) of about several tens of ohms to several hundreds of ohms is used. It is composed of a transistor circuit (transistor type oscillation circuit). The transistor-type oscillation circuit has a low gain, and thus can oscillate a thickness-shear vibrator, but oscillates a tuning fork vibrator or a double tuning fork vibrator having a crystal impedance of about several kΩ to several hundred kΩ. It is not possible.

International Publication No. 02/7302 Pamphlet JP 2003-229720 A Japanese Patent No. 4332859 JP 2009-258085 A Japanese Patent Publication 1-16049 JP-A-63-3316509 Japanese Patent Laid-Open No. 6-188631 JP 2000-286637 A JP 2008-136032 A

  An object of the present invention is to provide an oscillation circuit with an oscillation startup pulse generator that can shorten the startup time of the oscillation circuit, oscillate a vibrator with low power consumption at startup and a relatively large crystal impedance. It is to provide.

SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.
[Application Example 1]
An oscillation circuit with an oscillation start pulse generator circuit of the present invention has a circuit in which a plurality of oscillation circuit side circuit elements connected in series and a vibrator are connected in parallel, and the oscillation circuit side circuit element includes: An oscillation circuit that is an inverter or a buffer;
A three-state circuit element comprising a three-state inverter or a three-state buffer; a first signal connected to an input terminal and a control terminal of the three-state circuit element and sent to the input terminal of the three-state circuit element; A signal generation unit that generates a second signal that is sent to the control terminal of the circuit element and generates a second signal that is slower than the first signal to reach the threshold level of the three-state circuit element, and the three-state circuit element An oscillation start pulse generating circuit that outputs an oscillation start pulse from the output terminal of
An output terminal of the three-state circuit element is connected to an input terminal of the oscillation circuit side circuit element of any of the plurality of oscillation circuit side circuit elements,
After turning on the power, the oscillation start pulse is output from the output terminal of the three-state circuit element by the first signal, and then the output of the three-state circuit element becomes high impedance by the second signal, The oscillation start pulse generation circuit and the oscillation circuit are configured to be electrically cut off.

As a result, the startup time of the oscillation circuit (the time from when the power is turned on until the oscillation is started) can be shortened.
Further, after the oscillation starts, the output of the three-state circuit element becomes high impedance, and the oscillation starting pulse generation circuit and the oscillation circuit are electrically cut off, so that the oscillation of the oscillation circuit is not affected.
Further, since the oscillation circuit is an inverter type, it is possible to oscillate a vibrator having a relatively large crystal impedance, such as a tuning fork vibrator or a double tuning fork vibrator, and a piezoelectric oscillator described in Patent Document 1 Compared to the above, power consumption at the time of startup can be reduced.
In addition, since the oscillation circuit has a multi-stage configuration of inverters and buffers, it has a high gain, so that it can oscillate a vibrator with a higher crystal impedance, and the oscillation circuit rise time (output from the start of oscillation) (Time until the amplitude of the signal reaches a predetermined value) can be shortened.

[Application Example 2]
In the oscillation circuit with an oscillation starting pulse generation circuit of the present invention, the output terminal of the three-state circuit element is connected to the input terminal of the oscillation circuit side circuit element in the middle or the last stage among the plurality of oscillation circuit side circuit elements. It is preferable that they are connected.
Thereby, the starting time of the oscillation circuit can be further shortened.

[Application Example 3]
In the oscillation circuit with a pulse generation circuit for oscillation start according to the present invention, the oscillation circuit side circuit element immediately preceding the oscillation circuit side circuit element to which the output terminal of the three state circuit element is connected is a three-state inverter or a three-state inverter. An oscillation circuit side three-state circuit element composed of a state buffer is preferable.
Thereby, it can be made to oscillate reliably.

[Application Example 4]
In the oscillation circuit with an oscillation start pulse generation circuit according to the present invention, the control circuit of the oscillation circuit side three-state circuit element may include a signal supply line for inputting the second signal from the oscillation start pulse generation circuit. preferable.
Thereby, it can be made to oscillate reliably.

[Application Example 5]
In the oscillation circuit with an oscillation start pulse generation circuit according to the present invention, an inverter is provided in the signal supply line, and the second signal is inverted by the inverter and is controlled by the control terminal of the oscillation circuit side three-state circuit element. It is preferable that it is comprised so that it may input into.
Thereby, it can be made to oscillate reliably.

[Application Example 6]
In the oscillation circuit with an oscillation start pulse generating circuit of the present invention, when the output of the oscillation circuit side three-state circuit element is high impedance, the three-state circuit element is in an operating state, and the oscillation circuit side three-state circuit element When is activated, the output of the three-state circuit element is preferably high impedance.
Thereby, it can be made to oscillate reliably.

[Application Example 7]
In the oscillation circuit with a pulse generation circuit for oscillation start according to the present invention, the signal generation unit includes a first integration circuit in which a first resistor and a first capacitor are connected in series;
A second integrating circuit in which a second resistor and a second capacitor are connected in series;
The input terminal of the three-state circuit element is connected between the first resistor and the first capacitor, and the control terminal of the three-state circuit element is the second resistor and the second capacitor. It is preferable to be connected between.
As a result, the three-state circuit element can be reliably operated with a simple configuration.

[Application Example 8]
In the oscillation circuit with an oscillation start pulse generation circuit according to the present invention, it is preferable that a capacity of the second capacitor is larger than a capacity of the first capacitor.
Thereby, a 2nd signal can be generated reliably.
[Application Example 9]
In the oscillation circuit with a pulse generation circuit for oscillation startup according to the present invention, the signal generation unit includes an integration circuit in which a resistor and a capacitor are connected in series,
An input terminal is connected between the resistor and the capacitor, and an output terminal has an inverter or a buffer connected to a control terminal of the three-state circuit element,
The input terminal of the three-state circuit element is preferably connected between the resistor and the capacitor.
As a result, the three-state circuit element can be reliably operated with a simple configuration.

[Application Example 10]
In the oscillation circuit with a pulse generation circuit for oscillation startup according to the present invention, the signal generation unit includes an integration circuit in which a resistor and a capacitor are connected in series,
A plurality of circuit elements that are connected in series and have the same number as the plurality of oscillation circuit side circuit elements,
Of the plurality of circuit elements, an input terminal of the circuit element at the first stage is connected between the resistor and the capacitor, and an output terminal of the circuit element at the last stage is connected to a control terminal of the three-state circuit element. And
The input terminal of the three-state circuit element is preferably connected between the resistor and the capacitor.
As a result, the three-state circuit element can be reliably operated with a simple configuration.

[Application Example 11]
In the oscillation circuit with an oscillation start pulse generation circuit of the present invention, it is preferable that the signal generator has a timer.
As a result, the three-state circuit element can be reliably operated with a simple configuration.

[Application Example 12]
In the oscillation circuit with a pulse generation circuit for oscillation start according to the present invention, the signal generator preferably includes an inverter connected in series to the three-state circuit element.
This makes it possible to invert the oscillation starting pulse with a simple configuration as compared with the case where no inverter is provided in the signal generation unit.

[Application Example 13]
In the oscillation circuit with an oscillation start pulse generation circuit according to the present invention, the signal generation unit takes 1 to 500 nsec from when the power is turned on until the first signal reaches the threshold level of the three-state circuit element. It is preferable that it is comprised.
Thereby, it is possible to oscillate reliably while shortening the startup time of the oscillation circuit.

[Application Example 14]
In the oscillation circuit with an oscillation start pulse generating circuit according to the present invention, the oscillation start pulse has a displacement part that rises or falls when the first signal reaches a threshold level of the three-state circuit element. And
The signal generation unit is configured so that a time from when the power is turned on until the second signal reaches the threshold level of the three-state circuit element is determined based on the oscillation start-up pulse input to the oscillation circuit from the time when the power is turned on. It is preferable that the displacement unit is configured to be equal to or longer than the time until the displacement unit is output from the last circuit element on the oscillation circuit side.
Thereby, it can be made to oscillate reliably.
[Application Example 15]
In the oscillation circuit with a pulse generation circuit for oscillation start according to the present invention, the vibrator is preferably a tuning fork vibrator or a double tuning fork vibrator.
Thereby, the accuracy of oscillation can be improved.

1 is a circuit diagram showing a first embodiment of an oscillation circuit with a pulse generation circuit for oscillation start according to the present invention; FIG. 2 is a timing chart of the oscillation circuit with an oscillation starting pulse generation circuit shown in FIG. 3 is a truth table of a three-state inverter IC11 of the oscillation circuit with an oscillation starting pulse generation circuit shown in FIG. FIG. 5 is a circuit diagram showing an oscillation starting pulse generating circuit in a second embodiment of an oscillation circuit with an oscillation starting pulse generating circuit of the present invention. FIG. 9 is a circuit diagram showing an oscillation start pulse generating circuit in a third embodiment of an oscillation circuit with an oscillation start pulse generating circuit of the present invention. FIG. 10 is a circuit diagram showing an oscillation start pulse generating circuit in a fourth embodiment of an oscillation circuit with an oscillation start pulse generating circuit of the present invention. FIG. 10 is a circuit diagram showing an oscillation starting pulse generating circuit in a fifth embodiment of an oscillation circuit with an oscillation starting pulse generating circuit of the present invention; FIG. 10 is a circuit diagram showing an oscillation starting pulse generating circuit in a sixth embodiment of an oscillation circuit with an oscillation starting pulse generating circuit of the present invention. FIG. 12 is a circuit diagram showing a seventh embodiment of the oscillation circuit with an oscillation start pulse generating circuit of the present invention. FIG. 20 is a circuit diagram showing an oscillation starting pulse generating circuit in an eighth embodiment of an oscillation circuit with an oscillation starting pulse generating circuit of the present invention. It is a circuit diagram which shows 9th Embodiment of the oscillation circuit with a pulse generation circuit for oscillation starting of this invention. It is a circuit diagram which shows 10th Embodiment of the oscillation circuit with a pulse generation circuit for oscillation starting of this invention. It is a circuit diagram which shows 11th Embodiment of the oscillation circuit with a pulse generation circuit for oscillation starting of this invention.

Hereinafter, an oscillation circuit with a pulse generation circuit for oscillation start according to the present invention will be described in detail based on a preferred embodiment shown in the accompanying drawings.
<First Embodiment>
FIG. 1 is a circuit diagram showing a first embodiment of an oscillation circuit with an oscillation starting pulse generating circuit according to the present invention, FIG. 2 is a timing chart of the oscillation circuit with an oscillation starting pulse generating circuit shown in FIG. 2 is a truth table of a three-state inverter IC11 of the oscillation circuit with an oscillation start pulse generation circuit shown in FIG.

As shown in FIG. 1, an oscillation circuit 1 with an oscillation start pulse generator circuit is connected to a multi-stage inverter type oscillation circuit 2 and an input side of the oscillation circuit 2 and outputs an oscillation start pulse. And a generation circuit 3.
Note that the pulse includes not only a rectangular pulse but also a pulse having at least one displacement portion where the signal falls or falls.

  The oscillation circuit 2 is a Colpitts oscillation circuit, and includes three (a plurality of) inverters (oscillation circuit side circuit elements) IC1, IC2, and IC3 connected in series, and three (a plurality of) resistors (a plurality of resistors) connected in series ( Feedback resistors) R1, R2, and R3, and a series connection circuit of a vibrator (vibrating piece) Y1 and a resistor R4 are connected in parallel. In addition, the resistor R1 and the resistor R2 are connected to each other, the inverter IC1 and the inverter IC2 are connected to each other, the resistor R2 and the resistor R3 are connected to each other, and the inverter IC2 and the inverter IC3 are connected to each other. Has been.

In the oscillation circuit 2, one end side of the capacitor C1 is connected to the input terminal of the inverter IC1, one end side of the resistor R1, and one end side of the vibrator Y1, and the other end side of the capacitor C1 is grounded. Yes.
Further, one end side of the capacitor C2 is connected between the vibrator Y1 and the resistor R4, and the other end side of the capacitor C2 is grounded.

The vibrator Y1 is not particularly limited and can be appropriately selected depending on the application. For example, it is preferable to use a tuning fork vibrator or a double tuning fork vibrator. Thereby, the accuracy of oscillation can be improved.
Further, the inverters IC1 to IC3 are not particularly limited, but it is preferable to use, for example, a MOS inverter using a MOSFET.

In the present embodiment, only the inverter is used as the circuit element on the oscillation circuit side of the oscillation circuit 2. However, the present invention is not limited to this, and an inverter and a buffer may be used. However, in either of the case where only the inverter is used as the oscillation circuit side circuit element of the oscillation circuit 2 or the case where the inverter and the buffer are used, in the series circuit of the plurality of oscillation circuit side circuit elements of the oscillation circuit 2, Make sure to include an odd number of inverters.
Further, the number (number of stages) of the oscillation circuit side circuit elements of the oscillation circuit 2 is not limited to three, and may be two or four or more. When only an inverter is used as the oscillation circuit side circuit element of the oscillation circuit 2 as in the present embodiment, the number of the oscillation circuit side circuit elements is plural and odd.

  The oscillation starting pulse generating circuit 3 is connected to a three-state inverter IC11, which is a three-state circuit element, and to an input terminal and a control terminal of the three-state inverter IC11, and to a first signal and an output terminal sent to the input terminal. And a signal generator 4 for generating a second signal to be transmitted. The second signal is a signal that takes a longer time to reach the threshold level of the three-state inverter IC11 than the first signal. In the oscillation starting pulse generating circuit 3, an oscillation starting pulse is output from the output terminal of the three-state inverter IC11.

  The signal generation unit 4 includes an integration circuit (first integration circuit) 41 in which a resistor (first resistor) R11 and a capacitor (first capacitor) C11 are connected in series, and a resistor R (second resistor) 12 And an integration circuit (second integration circuit) 42 in which a capacitor (second capacitor) C12 is connected in series. One end sides of the resistors R11 and R12 are respectively connected to the power supply side, and one end sides of the capacitors C11 and C12 are respectively grounded.

  The input terminal of the three-state inverter IC11 is connected between the resistor R11 and the capacitor C11, and the control terminal of the three-state inverter IC11 is connected between the resistor R12 and the capacitor C12. As a result, the first signal is sent from the integration circuit 41 to the input terminal of the three-state inverter IC11, and the second signal is sent from the integration circuit 42 to the control terminal of the three-state inverter IC11. The output terminal of the three-state inverter IC11 is connected to the oscillation circuit 2, that is, the input terminal of the first-stage inverter IC1 among the three inverters IC1 to IC3.

  The output terminal of the three-state inverter IC11 is not limited to the input terminal of the first-stage inverter IC1 among the three inverters IC1 to IC3, and may be connected to the input terminal of any one of the inverters. However, the output terminal of the three-state inverter IC11 is preferably connected to the input terminal of the inverter IC2 in the middle or the input terminal of the last stage (final / final) inverter IC3 among the three inverters IC1 to IC3. This will be described not in the present embodiment but in other embodiments described later.

In the present embodiment, the capacity of the capacitor C12 is set larger than the capacity of the capacitor C11. As a result, the charging speed of the capacitor C12 is slower than the charging speed of the capacitor C11, and the time for the second signal to reach the threshold level of the three-state inverter IC11 is slower than the first signal.
The three-state inverter IC11 has an inverted control terminal. When the level of a signal input to the control terminal is H (high level) (1), the output is high impedance and L (low). When (level) (0), it is in the operating state and operates as an inverter.

  In this case, threshold levels are set on the input side and the control side of the three-state inverter IC11, respectively. When the level of the signal input to the input terminal of the three-state inverter IC11 is lower than the threshold level, the level of the signal input to the input terminal is L. When the level is higher than the threshold level, the input terminal The level of the signal input to is set to H. Similarly, when the level of the signal input to the control terminal of the three-state inverter IC11 is lower than the threshold level, the level of the signal input to the control terminal is set to L. When the level is higher than the threshold level, the control is performed. The level of the signal input to the terminal is H.

  As the three-state circuit element, a three-state buffer may be used instead of the three-state inverter IC11. Further, in either the three-state inverter IC11 or the three-state buffer, either an inversion type or a non-inversion type control terminal can be used.

Next, the operation (operation) of the oscillation circuit 1 with the oscillation start pulse generation circuit will be described. First, for the sake of easy understanding, the operation when the oscillation start pulse generation circuit 3 is not provided will be described. To do.
Oscillation of the oscillation circuit 2 is started by being charged or discharged by the capacitor C1 of the integrating circuit composed of the resistor R1 and the capacitor C1, as indicated by an arrow in FIG. . The cause of the start of oscillation is that the input of the inverter IC1 is inverted by charging or discharging of the integrating circuit, so that the output is inverted, and an oscillation loop that passes through the vibrator Y1 due to harmonics or noise generated at this time It is thought that the oscillation at is induced.
The starting time in this case is the product of the value of the resistor R1 (resistor) and the value of the capacitor C1 (capacitance).

Next, the oscillation circuit 1 with an oscillation starting pulse generation circuit will be described.
Note that the time from when the power is turned on until the first signal reaches the threshold level of the three-state inverter IC11 is T1, and the time until the second signal reaches the threshold level of the three-state inverter IC11 is T2.
As shown in FIG. 2, when the power is turned on, the capacitors C1 and C2 are charged, respectively, and the voltage applied to the input terminal of the three-state inverter IC11 and the voltage applied to the control terminal, that is, The level of the first signal and the level of the second signal each increase gradually. When the level of the first signal and the level of the second signal have not reached the threshold level of the three-state inverter IC11, the level of the signal input to the input terminal of the three-state inverter IC11 and the control terminal are input. Each signal level is L (1), and the output signal level of the three-state inverter IC11 is H (1) (see FIG. 3).

  When the level of the first signal reaches the threshold level, the level of the signal input to the input terminal of the three-state inverter IC11 becomes H, and the level of the output signal of the three-state inverter IC11 becomes L. (See FIG. 3). In this way, an oscillation starting pulse is output from the output terminal of the three-state inverter IC11. In this case, the fall (displacement part) of the oscillation start pulse contributes to the start of oscillation. The rising edge of the oscillation starting pulse may be a displacement portion.

  Here, by setting the time T1 from when the power is turned on to when the first signal reaches the threshold level of the three-state inverter IC11, the oscillation starting time can be shortened. Specifically, in the signal generator 4, the time T1 is preferably set to about 1 to 500 nsec, and more preferably set to about 1 to 300 nsec. Thereby, it is possible to reliably oscillate while shortening the startup time.

  The oscillation start pulse is input to the inverter IC1 of the oscillation circuit 2, inverted and output by the inverter IC1, further inverted and output by the inverter IC2, and further inverted by the inverter IC3 and output. Then, when the displacement part of the oscillation starting pulse is inverted and output by the inverter IC3 (when the level of the output signal of the inverter IC3 changes from one of H and L to the other), the oscillation starts. However, a delay time occurs between the input and output of each of the inverters IC1 to IC3. That is, a delay time of three inverters IC1 to IC3 is generated between the input of the inverter IC1 and the output of the inverter IC3.

  Therefore, the signal generation unit 4 starts the oscillation start when the time T2 from when the power is turned on until the second signal reaches the threshold level of the three-state inverter IC11 is input to the inverter IC1 (oscillation circuit 2) after the power is turned on. It is preferable that the displacement portion of the pulse for use is configured to be the same as or longer than the time until it is output after being inverted by the inverter IC3, and more preferably configured to be the same. Thereby, it can be made to oscillate reliably.

  When the time T2 is set larger than the time from when the power is turned on until the displacement part of the oscillation starting pulse input to the inverter IC1 is inverted and output by the inverter IC3, the time T2 is 2 It is preferably set to about ˜800 nsec, more preferably about 2 to 500 ns. Thereby, it can be made to oscillate reliably.

  When the level of the second signal reaches the threshold level, the level of the signal input to the control terminal of the three-state inverter IC11 becomes H, and the output of the three-state inverter IC11 becomes high impedance (see FIG. 3). . As a result, the oscillation starting pulse generation circuit 3 and the oscillation circuit 2 are electrically disconnected. Therefore, by setting the time T2 to be the same as the time from when the power is turned on until the displacement part of the oscillation starting pulse input to the inverter IC1 is inverted and output by the inverter IC3, the oscillation starts simultaneously. The output of the three-state inverter IC11 becomes high impedance, and the oscillation starting pulse generation circuit 3 and the oscillation circuit 2 can be electrically disconnected.

As described above, according to the oscillation circuit 1 with the oscillation start pulse generation circuit, the oscillation start pulse generation circuit 3 forcibly inputs the oscillation start pulse to the inverter IC1. (Time from when power is turned on to when oscillation starts) can be shortened.
Further, after the oscillation starts, the output of the three-state inverter IC11 becomes high impedance, and the oscillation starting pulse generation circuit 3 and the oscillation circuit 2 are electrically cut off, thereby affecting the oscillation of the oscillation circuit 2. There is no.

Since the oscillation circuit 2 is an inverter type, a vibrator having a relatively large crystal impedance such as a tuning fork vibrator or a double tuning fork vibrator can be oscillated. Compared with an oscillator, power consumption at startup can be reduced.
Further, since the oscillation circuit 2 has a three-stage (multi-stage) configuration of the inverters IC1, IC2, and IC3, the gain is high, and therefore a vibrator having a larger crystal impedance can be oscillated. Rise time (time from the start of oscillation until the amplitude of the output signal reaches a predetermined value) can be shortened.

Second Embodiment
FIG. 4 is a circuit diagram showing an oscillation starting pulse generating circuit in the second embodiment of the oscillation circuit with the oscillation starting pulse generating circuit of the present invention.
Hereinafter, the second embodiment will be described with a focus on the differences from the first embodiment described above, and the description of the same matters will be omitted.
The second embodiment is the same as the first embodiment except that the configuration of the oscillation starting pulse generation circuit is different.

  As shown in FIG. 4, in the oscillation circuit 1 with the oscillation start pulse generation circuit of the second embodiment, the signal generation unit 4 of the oscillation start pulse generation circuit 3 is an inverter IC12 connected in series to a three-state inverter IC11. have. The input terminal of the inverter IC12 is connected between the resistor R11 and the capacitor C11 of the first integrating circuit 41, and the output terminal is connected to the input terminal of the three-state inverter IC11.

As a result, the first signal is inverted by the inverter IC12 and input to the input terminal of the three-state inverter IC11, and the phase from the output terminal of the three-state inverter IC11 is reversed from that of the oscillation starting pulse in the first embodiment. The oscillation start pulse is output. In this case, the rise (displacement portion) of the oscillation start pulse contributes to the start of oscillation.
According to the oscillation circuit 1 with the oscillation start pulse generation circuit, the same effects as those of the first embodiment described above can be obtained.
The second embodiment can also be applied to each embodiment described later.

<Third Embodiment>
FIG. 5 is a circuit diagram showing an oscillation starting pulse generating circuit in the third embodiment of the oscillation circuit with the oscillation starting pulse generating circuit of the present invention.
Hereinafter, the third embodiment will be described with a focus on differences from the first embodiment described above, and descriptions of the same matters will be omitted.
The third embodiment is the same as the first embodiment except that the configuration of the oscillation starting pulse generation circuit is different.

As shown in FIG. 5, in the oscillation circuit 1 with the oscillation start pulse generating circuit of the third embodiment, the oscillation start pulse generating circuit 3 has a three-state buffer IC 13 as a three-state circuit element.
This three-state buffer IC 13 has an inverted control terminal, and when the level of the signal input to the control terminal is H (1), its output becomes high impedance, and when the level is L (0), it operates. State and act as a buffer.

As a result, an oscillation starting pulse whose phase is reversed from that of the oscillation starting pulse in the first embodiment is output from the output terminal of the three-state buffer IC13. In this case, the rise (displacement portion) of the oscillation start pulse contributes to the start of oscillation.
According to the oscillation circuit 1 with the oscillation start pulse generation circuit, the same effects as those of the first embodiment described above can be obtained.
The third embodiment can also be applied to each embodiment described later.

<Fourth embodiment>
FIG. 6 is a circuit diagram showing an oscillation starting pulse generating circuit in the fourth embodiment of the oscillation circuit with the oscillation starting pulse generating circuit of the present invention.
Hereinafter, the fourth embodiment will be described focusing on the differences from the first embodiment described above, and description of similar matters will be omitted.
The fourth embodiment is the same as the first embodiment except that the configuration of the oscillation starting pulse generation circuit is different.

As shown in FIG. 6, in the oscillation circuit 1 with the oscillation start pulse generation circuit of the fourth embodiment, the oscillation start pulse generation circuit 3 has a three-state buffer IC 14 as a three-state circuit element.
The three-state buffer IC 14 has a non-rotating control terminal, and when the level of the signal input to the control terminal is L (0), the output is high impedance, and when the level is H (1), Activated and acts as a buffer.

Further, the signal generator 4 has an inverter IC15 whose input terminal is connected between the resistor R12 and the capacitor C12 of the second integrating circuit 42 and whose output terminal is connected to the control terminal of the three-state buffer IC14. Yes. As a result, the second signal is inverted by the inverter IC 15 and input to the control terminal of the three-state buffer IC 14.
As a result, an oscillation starting pulse whose phase is reversed from that of the oscillation starting pulse in the first embodiment is output from the output terminal of the three-state buffer IC 14. In this case, the rise (displacement portion) of the oscillation start pulse contributes to the start of oscillation.
According to the oscillation circuit 1 with the oscillation start pulse generation circuit, the same effects as those of the first embodiment described above can be obtained.
The fourth embodiment can also be applied to each embodiment described later.

<Fifth Embodiment>
FIG. 7 is a circuit diagram showing an oscillation starting pulse generating circuit in the fifth embodiment of the oscillation circuit with the oscillation starting pulse generating circuit of the present invention.
Hereinafter, the fifth embodiment will be described with a focus on differences from the first embodiment described above, and descriptions of similar matters will be omitted.
The fifth embodiment is the same as the first embodiment except that the configuration of the oscillation starting pulse generation circuit is different.

As shown in FIG. 7, in the oscillation circuit 1 with the oscillation start pulse generation circuit of the fifth embodiment, the oscillation start pulse generation circuit 3 has a three-state inverter IC 16 as a three-state circuit element.
This three-state inverter IC 16 has a non-rotating control terminal, and when the level of the signal input to the control terminal is L (0), the output is high impedance, and when the level is H (1), Operates as an inverter.

  The signal generator 4 includes an integration circuit 41 in which a resistor R11 and a capacitor C11 are connected in series, and three (plural) inverters (circuit elements) IC17, IC18, and IC19 connected in series. ing. Of the three inverters IC17 to IC19, the input terminal of the first-stage inverter IC17 is connected between the resistor R11 and the capacitor C11, and the output terminal of the last-stage inverter IC19 is connected to the control terminal of the three-state inverter IC11. ing.

As a result, the first signal is sent from the integrating circuit 41 to the input terminal of the three-state inverter IC16.
The first signal output from the integration circuit 41 is inverted and delayed by the inverters IC17, IC18, and IC19, respectively, and becomes the second signal. The second signal is the three-state inverter. It is sent to the control terminal of the IC 16.

  Here, the feature of this embodiment is that the oscillator Y1 and the resistor in the oscillation circuit 2 are used as circuit elements of a series circuit connected between the resistor R11 and the capacitor C11 and the control terminal of the three-state inverter IC16. The same number and the same number of circuit elements as the plurality of oscillation circuit side circuit elements connected in parallel with the series connection circuit of R4 are used. That is, since the plurality of oscillation circuit side circuit elements in the oscillation circuit 2 are the three inverters IC1 to IC3, the oscillation starting pulse generation circuit 3 uses the three inverters IC17 to IC19 as the plurality of circuit elements. ing. When an inverter and a buffer are used as the oscillation circuit side circuit elements of the oscillation circuit 2, similarly, an inverter and a buffer are used as the circuit elements of the oscillation starting pulse generation circuit 3.

Thereby, the signal delay time in the inverters IC1 to IC3 of the oscillation circuit 2 and the signal delay time in the inverters IC17 to IC19 of the oscillation starting pulse generation circuit 3 can be matched.
That is, the delay time between the input of the inverter IC1 and the output of the inverter IC3 of the oscillation circuit 2 is equal to the delay time between the input of the inverter IC17 and the output of the inverter IC19. The time T2 until the signal reaches the threshold level of the three-state inverter IC16 and the time from when the power is turned on until the displacement part of the oscillation starting pulse input to the inverter IC1 is inverted and output by the inverter IC3 are Will be equal. As a result, at the same time as the oscillation is started, the output of the three-state inverter IC 16 becomes high impedance, and the oscillation starting pulse generation circuit 3 and the oscillation circuit 2 can be electrically disconnected.

According to the oscillation circuit 1 with the oscillation start pulse generation circuit, the same effects as those of the first embodiment described above can be obtained.
Note that, as a circuit element of a series circuit connected between the resistor R11 and the capacitor C11 and between the control terminal of the three-state inverter IC11, in parallel with the series connection circuit of the vibrator Y1 and the resistor R4 in the oscillation circuit 2 A circuit element different from the plurality of connected oscillation circuit side circuit elements may be used, or the number may be different from the plurality of oscillation circuit side circuit elements.
The fifth embodiment can also be applied to each embodiment described later.

<Sixth Embodiment>
FIG. 8 is a circuit diagram showing an oscillation starting pulse generating circuit in the sixth embodiment of the oscillation circuit with the oscillation starting pulse generating circuit of the present invention.
Hereinafter, the sixth embodiment will be described with a focus on differences from the first embodiment described above, and descriptions of similar matters will be omitted.
The sixth embodiment is the same as the first embodiment except that the configuration of the oscillation starting pulse generation circuit is different.

  As shown in FIG. 8, in the oscillation circuit 1 with the oscillation start pulse generation circuit of the sixth embodiment, the signal generation unit 4 of the oscillation start pulse generation circuit 3 is a timer circuit IC having a timer (clock means). It is configured. And the signal generation part 4 measures time with the timer, and sends out a 1st signal and a 2nd signal, respectively. As a result, the first signal and the second signal can be transmitted reliably.

Note that as the first signal and the second signal, it is preferable to use a pulse signal, in particular, a rectangular pulse signal.
According to the oscillation circuit 1 with the oscillation start pulse generation circuit, the same effects as those of the first embodiment described above can be obtained.
The sixth embodiment can also be applied to each embodiment described later.

<Seventh embodiment>
FIG. 9 is a circuit diagram showing a seventh embodiment of the oscillation circuit with an oscillation starting pulse generating circuit of the present invention. FIG. 9 shows an example of the resistance value of each resistor and the capacitance of each capacitor.
Hereinafter, the seventh embodiment will be described with a focus on differences from the first embodiment described above, and description of similar matters will be omitted.

As shown in FIG. 9, in the oscillation circuit 1 with the oscillation start pulse generating circuit of the seventh embodiment, the output terminal of the three-state inverter IC11 is connected to the input terminal of the last-stage inverter IC3.
Therefore, the oscillation start pulse output from the three-state inverter IC11 is input to the inverter IC3 at the final stage of the oscillation circuit 2, inverted by the inverter IC3, and output. When the displacement part of the oscillation starting pulse is inverted and output by the inverter IC3 (when the level of the output signal of the inverter IC3 changes from one of H and L to the other), the oscillation starts.

As described above, in the present embodiment, when the oscillation circuit 2 is started, the first-stage inverter IC1 and the intermediate inverter IC2 are compared with the case where the output terminal of the three-state inverter IC11 is connected to the input terminal of the first-stage inverter IC1. Since there is no delay of the oscillation starting pulse (signal) at, the starting time of the oscillation circuit 2 can be shortened.
Note that the output terminal of the three-state inverter IC11 may be connected to the input terminal of the inverter IC2 in the middle, but the startup time of the oscillation circuit 2 is longer when connected to the input terminal of the last-stage inverter IC3. This can be shortened and is preferable.

A three-state inverter (oscillator circuit-side three-state circuit element) IC4 is used as the oscillator circuit-side circuit element immediately before the inverter IC3 to which the output terminal of the three-state inverter IC11 is connected. The three-state inverter IC4 has an inverted control terminal, and the threshold level is set in the same manner as the three-state inverter IC11.
Note that a three-state buffer may be used as the oscillation circuit side circuit element immediately before the inverter IC3, but this will be described in another embodiment described later, not in this embodiment.

  In addition, the oscillation circuit 1 with the oscillation start pulse generation circuit is provided with a signal supply line 5 for inputting the second signal from the oscillation start pulse generation circuit 3 to the control terminal of the three-state inverter IC4. The signal supply line 5 is provided with an inverter IC 20. That is, the input terminal of the inverter IC20 is connected between the resistor R12 and the capacitor C12, and the output terminal of the inverter IC20 is connected to the control terminal of the three-state inverter IC4. As a result, the second signal is inverted by the inverter IC 20 and input to the control terminal of the three-state inverter IC 4. Thus, when the output of the three-state inverter IC11 is high impedance, the three-state inverter IC4 is in an operating state in which the three-state inverter IC11 operates as an inverter, and in the operating state in which the three-state inverter IC11 operates as an inverter, the three-state inverter IC4. The output of is high impedance.

Thus, when the power is turned on, first, as described above, the three-state inverter IC11 enters an operating state in which it operates as an inverter. On the other hand, the output of the three-state inverter IC4 becomes a high impedance, and the inverter IC3 is electrically disconnected from the circuit on the preceding stage side, so that oscillation can be started reliably.
Further, when the level of the second signal reaches the threshold level of the three-state inverter IC11 and IC14, the level of the signal input to the control terminal of the three-state inverter IC11 becomes H, and the output of the three-state inverter IC11 is As a result, the oscillation start pulse generation circuit 3 and the oscillation circuit 2 are electrically disconnected. On the other hand, the level of the signal input to the control terminal of the three-state inverter IC4 becomes L, and the three-state inverter IC4 enters an operating state in which it operates as an inverter, and functions as an inverter of the oscillation circuit 2.

Here, the respective starting times for the oscillation circuit 1 with the oscillation starting pulse generating circuit and the case where the oscillation starting pulse generating circuit 3 is not provided are calculated as follows.
First, each value of the resistor R1, the capacitor C1, the resistor R11 of the oscillation starting pulse generating circuit 3, and the capacitor C11 of the oscillation circuit 1 with the oscillation starting pulse generating circuit 1 is, for example, the resistance R1. The resistance value is 10 MΩ, the capacitance of the capacitor C1 is 100 pF, the resistance value of the resistor R11 is 10 kΩ, and the capacitance of the capacitor C11 is 100 pF.
When the oscillation starting pulse generating circuit 3 is not provided, the starting time is approximately 1 msec since the starting time is approximately the resistance value of the resistor R1 × the capacity of the capacitor C1.

On the other hand, in the oscillation circuit 1 with a pulse generation circuit for oscillation startup, the startup time is approximately the resistance value of the resistor R11 × the capacitance of the capacitor C11. I understand.
According to the oscillation circuit 1 with the oscillation start pulse generation circuit, the same effects as those of the first embodiment described above can be obtained.
In the oscillation circuit 1 with the oscillation start pulse generation circuit, the start-up time of the oscillation circuit 2 can be further shortened as compared with the first embodiment.

<Eighth Embodiment>
FIG. 10 is a circuit diagram showing an oscillation starting pulse generating circuit in an eighth embodiment of the oscillation circuit with the oscillation starting pulse generating circuit of the present invention.
Hereinafter, the eighth embodiment will be described with a focus on differences from the above-described seventh embodiment, and description of similar matters will be omitted.
The eighth embodiment is the same as the seventh embodiment except that the configuration of the oscillation starting pulse generation circuit is different.

As shown in FIG. 10, in the oscillation circuit 1 with the oscillation start pulse generation circuit of the eighth embodiment, the oscillation start pulse generation circuit 3 has a three-state inverter IC 16 as a three-state circuit element. The three-state inverter IC 16 has a non-rotating control terminal.
The signal generation unit 4 includes an integration circuit 41 in which a resistor R11 and a capacitor C11 are connected in series, an input terminal connected between the resistor R11 and the capacitor C11, and an output terminal that is a control terminal of the three-state inverter IC11. And an inverter IC 17 connected to the.

As a result, the first signal is sent from the integrating circuit 41 to the input terminal of the three-state inverter IC11.
The first signal output from the integration circuit 41 is inverted and delayed by the inverter IC 17 to become a second signal, and the second signal is sent to the control terminal of the three-state inverter IC 16. The

  Here, the feature of the present embodiment is that the oscillator Y1 and the resistor R4 in the oscillation circuit 2 are connected in series as a circuit element connected between the resistor R11 and the capacitor C11 and the control terminal of the three-state inverter IC16. The same circuit element as the last stage oscillation circuit side circuit element is used among the plurality of oscillation circuit side circuit elements connected in parallel with the connection circuit. That is, since the last oscillation circuit side circuit element of the plurality of oscillation circuit side circuit elements in the oscillation circuit 2 is the inverter IC3, in the oscillation starting pulse generation circuit 3, the inverter IC17 is used as the circuit element. Used. When a buffer is used as the last-stage oscillation circuit side circuit element of the plurality of oscillation circuit side circuit elements of the oscillation circuit 2, the buffer element is similarly used as the circuit element of the oscillation starting pulse generation circuit 3. Is used.

Thereby, the delay time of the signal in the inverter IC3 of the oscillation circuit 2 can be matched with the delay time of the signal in the inverter IC17 of the oscillation start pulse generating circuit 3.
That is, the delay time between the input of the inverter IC3 and the output of the inverter IC3 of the oscillation circuit 2 is equal to the delay time between the input of the inverter IC17 and the output of the inverter IC17. The time T2 until the signal reaches the threshold level of the three-state inverter IC16 and the time from when the power is turned on until the displacement part of the oscillation starting pulse input to the inverter IC3 is inverted and output by the inverter IC3 Will be equal. As a result, at the same time as the oscillation is started, the output of the three-state inverter IC 16 becomes high impedance, and the oscillation starting pulse generation circuit 3 and the oscillation circuit 2 can be electrically disconnected.

According to the oscillation circuit 1 with the oscillation start pulse generation circuit, the same effect as that of the above-described eighth embodiment can be obtained.
As a circuit element connected between the resistor R11 and the capacitor C11 and between the control terminal of the three-state inverter IC11, it is connected in parallel with the series connection circuit of the vibrator Y1 and the resistor R4 in the oscillation circuit 2. Of the plurality of oscillation circuit side circuit elements, a circuit element different from the last oscillation circuit side circuit element may be used. For example, one may be an inverter and the other may be a buffer.
The eighth embodiment can also be applied to each embodiment described later.

<Ninth Embodiment>
FIG. 11 is a circuit diagram showing a ninth embodiment of the oscillation circuit with an oscillation starting pulse generating circuit of the present invention. FIG. 9 shows an example of the resistance value of each resistor and the capacitance of each capacitor.
Hereinafter, the ninth embodiment will be described focusing on differences from the above-described seventh embodiment, and description of similar matters will be omitted.

As shown in FIG. 11, in the oscillation circuit 1 with the oscillation start pulse generation circuit of the ninth embodiment, a Terman oscillation circuit is used as the oscillation circuit 2.
In the oscillation circuit 2, one end side of the capacitor C2 is connected between the vibrator Y1 and the resistor R4, and the other end side of the capacitor C2 is grounded.
Further, one end side of the capacitor C3 is connected between the output terminal of the three-state inverter IC4 and the input terminal of the inverter IC3, and the other end side of the capacitor C3 is connected between the vibrator Y1 and the resistor R4. Yes.

In FIG. 11, “Cst” indicated by a broken line is not an actual element but a capacitance component in the inverter IC1 in the equivalent circuit.
In the oscillation circuit 1 with the oscillation start pulse generation circuit, as in the seventh embodiment, the output terminal of the three-state inverter IC11 is connected to the input terminal of the last-stage inverter IC3. The description is omitted below.

It is to be noted that the respective startup times for the oscillation circuit 1 with the oscillation start pulse generation circuit and the case where the oscillation start pulse generation circuit 3 is not provided are calculated as follows.
First, each value of the resistor R1, the equivalent capacitor Cst, the resistor R11 of the oscillation starting pulse generating circuit 3, and the capacitor C11 of the oscillation circuit 1 with the oscillation starting pulse generating circuit 1 is, for example, the resistor R1. , The resistance value of the equivalent capacitor Cst is 10 pF, the resistance value of the resistor R11 is 10 kΩ, and the capacitance of the capacitor C11 is 100 pF.
When the oscillation starting pulse generation circuit 3 is not provided, the starting time is approximately 0.1 ms because the starting time is approximately the resistance value of the resistor R1 × the capacity of the equivalent capacitor Cst.

On the other hand, in the oscillation circuit 1 with a pulse generation circuit for oscillation startup, the startup time is approximately the resistance value of the resistor R11 × the capacitance of the capacitor C11. I understand.
According to the oscillation circuit 1 with the oscillation start pulse generation circuit, the same effects as those of the seventh embodiment described above can be obtained.

<Tenth Embodiment>
FIG. 12 is a circuit diagram showing a tenth embodiment of the oscillation circuit with an oscillation starting pulse generation circuit of the present invention.
Hereinafter, the tenth embodiment will be described with a focus on differences from the above-described seventh embodiment, and description of similar matters will be omitted.

  As shown in FIG. 12, in the oscillation circuit 1 with the oscillation start pulse generation circuit of the tenth embodiment, the oscillation circuit 2 includes an inverter IC1 and a three-state buffer IC5 as three oscillation circuit side circuit elements connected in series. In addition, a buffer IC 6 is used. Further, the inverter IC1, the three-state buffer IC5, and the buffer IC6 are connected in this order from the front side to the rear side.

The three-state buffer IC5 has an inverted control terminal, and when the level of the signal input to the control terminal is H (1), the output is high impedance, and when the level is L (0), Activated and acts as a buffer.
In the oscillation circuit 1 with the oscillation start pulse generating circuit, as in the seventh embodiment, the output terminal of the three-state inverter IC11 is connected to the input terminal of the last-stage buffer IC6. The description is omitted below.
According to the oscillation circuit 1 with the oscillation start pulse generation circuit, the same effects as those of the seventh embodiment described above can be obtained.

<Eleventh embodiment>
FIG. 13 is a circuit diagram showing an eleventh embodiment of the oscillation circuit with an oscillation starting pulse generating circuit of the present invention.
Hereinafter, the eleventh embodiment will be described with a focus on differences from the seventh embodiment described above, and description of similar matters will be omitted.

  As shown in FIG. 13, in the oscillation circuit 1 with the oscillation start pulse generation circuit of the eleventh embodiment, the oscillation circuit 2 includes three inverter circuits IC3 and three-state buffer IC7 as three oscillation circuit side circuit elements connected in series. In addition, a buffer IC 6 is used. Further, the inverter IC1, the three-state buffer IC7, and the buffer IC6 are connected in this order from the front side to the rear side.

The three-state buffer IC 7 has a non-inverted control terminal. When the level of a signal input to the control terminal is L (0), the output is high impedance, and when the level is H (1). , Become active and act as a buffer.
Further, in the oscillation starting pulse generating circuit 3, a three-state buffer IC 22 having a non-inverted control terminal is used as a three-state circuit element.

  The signal generation unit 4 includes an inverter IC21 whose input terminal is connected between the resistor R12 and the capacitor C12 of the second integration circuit 42 and whose output terminal is connected to the control terminal of the three-state buffer IC22. Yes. As a result, the second signal is inverted by the inverter IC21 and input to the control terminal of the three-state buffer IC22 and the inverter IC20.

In the oscillation circuit 1 with the oscillation start pulse generating circuit, the output terminal of the three-state buffer IC 22 is connected to the input terminal of the last-stage buffer IC 6 as in the seventh embodiment. The description is omitted below.
According to the oscillation circuit 1 with the oscillation start pulse generation circuit, the same effects as those of the seventh embodiment described above can be obtained.

As described above, the oscillation circuit with a pulse generation circuit for oscillation start according to the present invention has been described based on the illustrated embodiment. However, the present invention is not limited to this, and the configuration of each part is an arbitrary function having the same function. It can be replaced with the configuration of Moreover, other arbitrary structures and processes may be added to the present invention.
Further, the present invention may be a combination of any two or more configurations (features) of the above embodiments.

  DESCRIPTION OF SYMBOLS 1 ... Oscillation circuit with an oscillation start pulse generation circuit 2 ... Oscillation circuit 3 ... Oscillation start pulse generation circuit 4 ... Signal generation part 41, 42 ... Integration circuit 5 ... Signal supply line R1, R2, R3, R4, R11, R12 ... Resistors C1, C2, C3, C11, C12 ... Capacitors IC1, IC2, IC3, IC12, IC15, IC17, IC18, IC19, IC20, IC21 ... Inverter IC6 ... Buffer IC4, IC11, IC16 ... Three-state inverter IC5, IC7, IC13, IC14, IC22 ... Three-state buffer Y1 ... Vibrator

Claims (15)

A plurality of oscillation circuit side circuit elements connected in series and a circuit in which a vibrator is connected in parallel, the oscillation circuit side circuit element being an inverter or a buffer;
A three-state circuit element comprising a three-state inverter or a three-state buffer; a first signal connected to an input terminal and a control terminal of the three-state circuit element and sent to the input terminal of the three-state circuit element; A signal generation unit that generates a second signal that is sent to the control terminal of the circuit element and generates a second signal that is slower than the first signal to reach the threshold level of the three-state circuit element, and the three-state circuit element An oscillation start pulse generating circuit that outputs an oscillation start pulse from the output terminal of
An output terminal of the three-state circuit element is connected to an input terminal of the oscillation circuit side circuit element of any of the plurality of oscillation circuit side circuit elements,
After turning on the power, the oscillation start pulse is output from the output terminal of the three-state circuit element by the first signal, and then the output of the three-state circuit element becomes high impedance by the second signal, An oscillation circuit with an oscillation start pulse generation circuit, wherein the oscillation start pulse generation circuit and the oscillation circuit are electrically cut off.   2. The oscillation start pulse according to claim 1, wherein an output terminal of the three-state circuit element is connected to an input terminal of the oscillation circuit side circuit element in the middle or last stage among the plurality of oscillation circuit side circuit elements. Oscillator with generator circuit.   The oscillation circuit side circuit element immediately preceding the oscillation circuit side circuit element to which the output terminal of the three state circuit element is connected is an oscillation circuit side three state circuit element including a three state inverter or a three state buffer. Item 3. An oscillation circuit with an oscillation start pulse generation circuit according to Item 2.   4. The oscillation circuit with an oscillation start pulse generation circuit according to claim 3, further comprising a signal supply line for inputting the second signal from the oscillation start pulse generation circuit to a control terminal of the oscillation circuit side three-state circuit element.   5. The inverter according to claim 4, wherein an inverter is provided in the signal supply line, and the second signal is inverted by the inverter and input to a control terminal of the three-state circuit element on the oscillation circuit side. Oscillation circuit with a pulse generator for starting oscillation.   When the output of the oscillation circuit side three-state circuit element is high impedance, the three-state circuit element is in an operating state, and when the oscillation circuit side three-state circuit element is in an operation state, the output of the three-state circuit element is 6. The oscillation circuit with an oscillation starting pulse generation circuit according to claim 3, wherein the oscillation circuit has a high impedance. The signal generator includes a first integrating circuit in which a first resistor and a first capacitor are connected in series;
A second integrating circuit in which a second resistor and a second capacitor are connected in series;
The input terminal of the three-state circuit element is connected between the first resistor and the first capacitor, and the control terminal of the three-state circuit element is the second resistor and the second capacitor. 7. An oscillation circuit with an oscillation start pulse generating circuit according to claim 1, which is connected between the oscillation circuits.   8. The oscillation circuit with an oscillation start pulse generation circuit according to claim 7, wherein a capacity of the second capacitor is larger than a capacity of the first capacitor. The signal generator includes an integrating circuit in which a resistor and a capacitor are connected in series;
An input terminal is connected between the resistor and the capacitor, and an output terminal has an inverter or a buffer connected to a control terminal of the three-state circuit element,
7. The oscillation circuit with an oscillation starting pulse generation circuit according to claim 1, wherein an input terminal of the three-state circuit element is connected between the resistor and the capacitor. The signal generator includes an integrating circuit in which a resistor and a capacitor are connected in series;
A plurality of circuit elements that are connected in series and have the same number as the plurality of oscillation circuit side circuit elements,
Of the plurality of circuit elements, an input terminal of the circuit element at the first stage is connected between the resistor and the capacitor, and an output terminal of the circuit element at the last stage is connected to a control terminal of the three-state circuit element. And
7. The oscillation circuit with an oscillation starting pulse generation circuit according to claim 1, wherein an input terminal of the three-state circuit element is connected between the resistor and the capacitor.   7. The oscillation circuit with an oscillation start pulse generation circuit according to claim 1, wherein the signal generation unit includes a timer.   12. The oscillation circuit with an oscillation starting pulse generation circuit according to claim 1, wherein the signal generation unit includes an inverter connected in series to the three-state circuit element.   13. The signal generator according to claim 1, wherein the time required for the first signal to reach a threshold level of the three-state circuit element is 1 to 500 ns after power-on. An oscillation circuit with a pulse generation circuit for oscillation start described in 1. The oscillation start pulse has a displacement part that rises or falls when the first signal reaches a threshold level of the three-state circuit element;
The signal generation unit is configured so that a time from when the power is turned on until the second signal reaches the threshold level of the three-state circuit element is determined based on the oscillation start-up pulse input to the oscillation circuit from the time when the power is turned on. 14. The oscillation starting pulse generation circuit according to claim 1, wherein the displacement unit is configured to be equal to or longer than a time until the displacement unit is output from the last circuit element of the oscillation circuit. With oscillation circuit.   15. The oscillation circuit with an oscillation starting pulse generation circuit according to claim 1, wherein the vibrator is a tuning fork vibrator or a double tuning fork vibrator.

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