JP5533051B2 - Oscillator with signal generator - Google Patents

Description

The present invention relates to an oscillation circuit with a signal generator .

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 a signal generator capable of shortening the startup time of an oscillation circuit, oscillating a vibrator with low power consumption at startup and a relatively large crystal impedance. It is in.

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]
Signal generator with oscillator circuit of the present invention, oscillation circuit having an Doko vibration and amplifying elements are connected in a parallel circuit,
An output terminal connected to the input terminal of the amplifying element, and a three-state circuit element that outputs an oscillation starting pulse from the output terminal ; and
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 ; and a first signal sent to the control terminal of the three-state circuit element; It has a signal generating unit, for generating a slow second signal time to reach the threshold level of the three-state circuit elements than,
Before Symbol Three-state circuit elements by the first signal, and outputs a pre-Symbol oscillation startup pulse, the pre-Symbol second signal, electrically cut off between the oscillation circuit and the signal generator It is characterized by that.

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.
In addition, after the start of oscillation, the output of the three-state circuit element becomes high impedance, and the signal generator 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.

[Application Example 2]
In the oscillation circuit with a signal generation unit of 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 resistor, and a second capacitor. It includes but a second integrator connected in series, and
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 3]
In the oscillation circuit with a signal generator 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 4]
In the signal generator with oscillator circuit of the present invention, the signal generating portion includes the integration circuit resistance and the capacitor are connected in series, and an input terminal connected between the capacitor and the resistor, the output terminal is the having an inverter, connected to the control terminal of the three-state circuit elements,
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 5]
In the oscillation circuit with a signal generator 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 6]
In the oscillation circuit with a signal generator of the present invention, it is preferable that the signal generator has 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 7]
In the signal generator with oscillator circuit of the present invention, the signal generating unit, the time from power up the first signal reaches the threshold level of the three-state circuit elements in the following 500n seconds 1 n sec there it is preferable.
Thereby, it is possible to oscillate reliably while shortening the startup time of the oscillation circuit.

[Application Example 8]
In the oscillation circuit with a signal generation unit of the present invention, the oscillation start pulse has a displacement unit that rises or falls when the first signal reaches a threshold level of the three-state circuit element,
The signal generating unit is configured such that the time from when the power is turned on until the second signal reaches the threshold level of the three-state circuit element is determined by the displacement unit of the oscillation starting pulse input to the oscillation circuit. It is preferable that the time until output from the oscillation circuit is exceeded.
Thereby, it can be made to oscillate reliably.
[Application Example 9]
In the oscillation circuit with a signal generator 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.
[Application Example 10]
An oscillation circuit with a signal generation unit of the present invention includes an oscillation circuit having a circuit in which an amplification element and a vibrator are connected in parallel,
An output terminal connected to the input terminal of the amplifying element, and a three-state circuit element that outputs an oscillation starting pulse from the output terminal; and
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; and a first signal sent to the control terminal of the three-state circuit element; A signal generator for generating a second signal that takes a longer time to reach the threshold level of the three-state circuit element than
The signal generator includes a first integrating circuit in which a first resistor and a first capacitor are connected in series, and a second integrating circuit in which a second resistor and a second capacitor are connected in series. And comprising
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. Connected between
The three-state circuit element outputs the oscillation start pulse by the first signal, and electrically cuts off the signal generator and the oscillation circuit by the second signal. And
[Application Example 11]
An oscillation circuit with a signal generation unit of the present invention includes an oscillation circuit having a circuit in which an amplification element and a vibrator are connected in parallel,
An output terminal connected to the input terminal of the amplifying element, and a three-state circuit element that outputs an oscillation starting pulse from the output terminal; and
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; and a first signal sent to the control terminal of the three-state circuit element; A signal generator for generating a second signal that takes a longer time to reach the threshold level of the three-state circuit element than
The signal generator 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 is connected to a control terminal of the three-state circuit element. An inverter,
The input terminal of the three-state circuit element is connected between the resistor and the capacitor,
The three-state circuit element outputs the oscillation start pulse by the first signal, and electrically cuts off the signal generator and the oscillation circuit by the second signal. When

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.

Hereinafter, an oscillation circuit with an oscillation start pulse generator (an oscillation circuit with a signal generator) according to the present invention will be described in detail based on preferred embodiments 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 is connected to an inverter type oscillation circuit 2 and an input side of the oscillation circuit 2 and outputs an oscillation start pulse. 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 has a circuit in which an inverter IC1, a resistor (feedback resistor) R1, and a series connection circuit of a vibrator (vibrating piece) Y1 and a resistor R2 are connected in parallel. . Although it does not specifically limit as inverter IC1, For example, it is preferable to use the MOS inverter etc. which used MOSFET.
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.

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.
In addition, one end side of the capacitor C2 is connected between the vibrator Y1 and the resistor R2, and the other end side of the capacitor C2 is grounded.

  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 inverter IC1.

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 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 by the inverter IC1, and output. When the displacement part of the oscillation starting pulse is inverted and output by the inverter IC1, oscillation is started. However, a delay time is generated between the input and output of the inverter IC1.

Therefore, the signal generation unit 4 has a time T2 from when the power is turned on until the second signal reaches the threshold level of the three-state inverter IC11. The displacement part of the oscillation start pulse input to the inverter IC1 from the time of power on. Is preferably configured to be equal to or longer than the time until the signal is inverted by the inverter IC1 and output, and more preferably the same. Thereby, it can be made to oscillate reliably.
When the time T2 is set to be longer than the time from when the power is turned on until the displacement part of the oscillation start pulse input to the inverter IC1 is inverted and output by the inverter IC1, the time T2 is 2 It is preferably set to about ˜800 nsec, more preferably about 2 to 500 ns.

  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 IC1, the time T2 is started simultaneously with the start of oscillation. 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.

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.

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.

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.
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.

<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.
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.
The three-state buffer IC 13 has an inverted control terminal. 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), the buffer is buffered. Operates as
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.

<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.
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), 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.

<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.
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 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 IC16. 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 IC16.
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

The inverter IC 17 is preferably the same as the inverter IC 1 of the oscillation circuit 2. As a result, the delay time between the input and the output at the inverter IC1 of the oscillation circuit 2 and the delay time between the input and the output at the inverter IC17 become equal, and the second signal becomes three after the power is turned on. The time T2 until reaching the threshold level of the state inverter IC16 is equal to 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 IC1. 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.

<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.
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.

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 oscillation starting pulse generation circuit 2 ... Oscillation circuit 3 ... Pulse generation circuit for oscillation startup 4 ... Signal generation part 41, 42 ... Integration circuit R1, R2, R11, R12 ... Resistor C1, C2, C11, C12 ... Condenser IC1, IC12, IC15, IC17 ... Inverter IC11, IC16 ... Three-state inverter IC13, IC14 ... Three-state buffer Y1 ... Vibrator

Claims (7)

An oscillation circuit having a circuit in which an amplification element and a vibrator are connected in parallel;
An output terminal is connected to the input terminal of the amplifying element, and a three-state circuit element that outputs an oscillation starting pulse from the output terminal; and an input terminal and a control terminal of the three-state circuit element; The first signal sent to the input terminal of the state circuit element and the time sent to the control terminal of the three-state circuit element to reach the threshold level of the three-state circuit element is later than the first signal. A signal generator for generating two signals,
The signal generator includes a first integrating circuit in which a first resistor and a first capacitor are connected in series, and a second integrating circuit in which a second resistor and a second capacitor are connected in series. And comprising
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. Connected between
The three-state circuit element outputs the oscillation start pulse by the first signal, and electrically cuts off the signal generator and the oscillation circuit by the second signal. An oscillation circuit with a signal generator. The capacity of the second capacitor, the signal generator with oscillator circuit according to claim 1, wherein greater than the capacity of the first capacitor. An oscillation circuit having a circuit in which an amplification element and a vibrator are connected in parallel;
An output terminal is connected to the input terminal of the amplifying element, and a three-state circuit element that outputs an oscillation starting pulse from the output terminal; and an input terminal and a control terminal of the three-state circuit element; The first signal sent to the input terminal of the state circuit element and the time sent to the control terminal of the three-state circuit element to reach the threshold level of the three-state circuit element is later than the first signal. A signal generator for generating two signals,
The signal generator 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 is connected to a control terminal of the three-state circuit element. An inverter,
The input terminal of the three-state circuit element is connected between the resistor and the capacitor,
The three-state circuit element outputs the oscillation start pulse by the first signal, and electrically cuts off the signal generator and the oscillation circuit by the second signal. An oscillation circuit with a signal generator. The signal generating unit, signal generator with oscillator according to any one of claims 1 to 3, characterized in that it comprises an inverter connected in series with the three-state circuit elements. The signal generating unit of claims 1, wherein the time from power-on to the first signal reaches the threshold level of the three-state circuit elements is less than 1n seconds 500n seconds 4 The oscillation circuit with a signal generation part as described in any one. 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 generating unit is configured such that the time from when the power is turned on until the second signal reaches the threshold level of the three-state circuit element is determined by the displacement unit of the oscillation starting pulse input to the oscillation circuit. signal generator with oscillator circuit according to any one of claims 1 to 5, characterized in that up to the time or more output from the oscillation circuit. The transducer, the tuning-fork oscillator or the signal generator with oscillator circuit according to any one of claims 1 to 6, characterized in that a double-ended tuning fork type vibrator.

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