JPH06216770A - Oscillator - Google Patents

Abstract

PURPOSE:To provide highly stable high frequency output with inexpensive constitution by setting the output frequency of a voltage controlled oscillator and the input frequency of a phase locked loop control circuit lover than the output frequency of an oscillation circuit. CONSTITUTION:A signal with frequency of the sum of two oscillation frequencies out of signals obtained by inputting each oscillation output of a voltage controlled oscillator 1 and a fixed frequency oscillator 6 to a multiplication circuit 7 is taken out as output, and a signal with frequency of difference is inputted to the phase locked loop control circuit 3, and the voltage controlled oscillator 1 is controlled by the control output of the circuit 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oscillating device used in a microwave band millimeter wave band radio device or the like.

[0002]

2. Description of the Related Art FIG. 6 is a block diagram showing a conventional oscillator, in which 1 is a voltage controlled oscillator, 2 is a distributor for distributing the output of the voltage controlled oscillator 1, and 3 is a phase with the voltage controlled oscillator 1. A phase synchronization control circuit that constitutes a lock loop, 4 is a frequency multiplication circuit, and 5 is an output terminal.

Next, the operation will be described. First, the oscillation output of the voltage controlled oscillator 1 is distributed by the distributor 2, and one of the signals is input to the phase synchronization control circuit 3. The phase synchronization control circuit 3 outputs a control voltage for adjusting the oscillation frequency of the voltage controlled oscillator 1 to the determined frequency, and inputs the control voltage to the voltage controlled oscillator 1.

As described above, the voltage-controlled oscillator 1 and the phase-locked control circuit 3 constitute a phase-locked loop, and the oscillation output frequency of the voltage-controlled oscillator 1 is highly stabilized. Of the oscillation outputs that are highly stabilized and distributed by the distributor 2, the other is input to the frequency multiplication circuit 4, multiplied to a prescribed frequency, and output from the output terminal 5.

[0005]

Since the conventional oscillating device is constructed as described above, the frequency multiplying circuit 4 is required to obtain a high frequency signal, and the operation of this frequency multiplying circuit 4 is also required. Unstable, complicated circuit configuration,
Furthermore, there was a problem that it was difficult to adjust the frequency.

There is also a conventional example in which the voltage-controlled oscillator 1 oscillating a specified high frequency is controlled by the phase synchronization control circuit 3 and the frequency multiplication circuit 4 is not used, but it is realized in a relatively low microwave frequency band. However, as the frequency becomes higher, it becomes difficult to realize a high frequency output only by the voltage controlled oscillator 1 and the phase locked loop control circuit 3, and eventually the frequency multiplication circuit 4 as described above is required, which causes the above problems. Became.

The invention of claim 1 has been made in order to solve the above-mentioned problems. A frequency multiplication circuit can be dispensed with, and the output frequency of the voltage controlled oscillator is the same as that of the signal input to the phase synchronization control circuit. The frequency can be made lower than the output frequency of the oscillation circuit, and an object of the present invention is to obtain a low-cost oscillator in which a desired high frequency signal can be stably obtained.

The invention of claim 2 is a phase-locked loop configuration 2
An object of the present invention is to obtain an oscillating device capable of outputting an extremely stable high frequency signal by using a signal having a frequency that is the sum of the oscillation outputs of the system oscillation circuit.

It is an object of the present invention to provide an oscillating device capable of outputting a sufficiently stable high frequency signal with a simple circuit by using an oscillating circuit stabilized by a phase locked loop.

It is an object of the invention of claim 4 to obtain an oscillating device capable of outputting a highly stable high frequency signal by using each oscillation output of a fixed frequency oscillator and an oscillation circuit of a phase locked loop configuration.

It is an object of the invention of claim 5 to obtain an oscillating device which can output a more stable high frequency signal by using the oscillating outputs of two fixed frequency oscillators.

[0012]

According to another aspect of the invention, there is provided an oscillating device which outputs a signal having a sum and a difference of an oscillating frequency of a fixed frequency oscillator and an oscillating frequency of a voltage controlled oscillator constituting a phase locked loop. A multiplying circuit, and a first filter for taking out the signal of the sum frequency output from the multiplying circuit,
A second filter for extracting the signal of the difference frequency output from the multiplying circuit, and the voltage control for the phase synchronization control circuit based on the signal of the difference frequency extracted from the second filter. The oscillation frequency of the oscillator is controlled.

An oscillating device according to a second aspect of the present invention oscillates the voltage controlled oscillator based on the voltage controlled oscillator, a distributor for distributing the oscillated output of the voltage controlled oscillator, and one oscillated output outputted from the distributor. Two systems of phase-locked loops consisting of a phase-locked control circuit for controlling the output are provided, and signals of the sum and difference frequencies of the other oscillation outputs output from the distributors of these two systems are output from the multiplication circuit, A signal having the above sum frequency is taken out from the multiplication circuit and output by a filter.

An oscillating device according to a third aspect of the present invention provides a first voltage-controlled oscillator, a distributor for distributing an oscillating output of the first voltage-controlled oscillator, and one oscillating output output from the distributor. Based on the first phase-locked control circuit for controlling the oscillation output of the first voltage-controlled oscillator, the sum and difference frequencies of the other oscillation frequency output from the distributor and the oscillation frequency of the second voltage-controlled oscillator. Which controls the oscillation frequency of the second voltage controlled oscillator by the second phase synchronization control circuit based on the multiplication circuit for outputting the signal and the frequency difference signal output by the multiplication circuit. Is.

According to a fourth aspect of the present invention, there is provided an oscillating device including a phase synchronization control circuit for controlling an oscillating output of a voltage controlled oscillator based on one oscillating output from a distributor, an oscillating frequency of a fixed frequency oscillator, and A multiplication circuit that outputs a signal of the sum and difference frequency of the other oscillation frequency output from the distributor is provided, and the filter outputs the signal of the sum frequency output by the multiplication circuit. It is a thing.

An oscillator according to a fifth aspect of the present invention is provided with a multiplying circuit for outputting a signal having a sum and a difference frequency of each oscillation output of the first fixed frequency oscillator and the second fixed frequency oscillator, and a filter. Thus, the signal of the sum frequency is taken out from the multiplication circuit and output.

[0017]

According to another aspect of the invention, the oscillation device obtains the signals of the sum and difference frequencies of the output frequencies of the voltage controlled oscillator and the fixed frequency oscillator at the same time by using the multiplication circuit, and outputs the signals of the sum frequency. And On the other hand, by inputting the signal of the difference frequency to the phase synchronization control circuit, the output frequency of the voltage controlled oscillator and fixed frequency oscillator and the input frequency of the phase synchronization control circuit are made lower than the oscillation circuit output frequency, and the frequency multiplication circuit It is possible to output a high frequency signal without using.

According to the second aspect of the present invention, an oscillation device is provided with two oscillation circuits having a phase-locked loop configuration, and a signal having a sum frequency of these oscillation outputs can be output as a high frequency signal. The signal functions to keep the output frequency of the voltage controlled oscillator of each system constant through the phase synchronization control circuit.

The oscillator according to the third aspect of the present invention uses the stable oscillation circuit in the phase-locked loop so that a highly stable high frequency signal can be output with a simple structure.

According to the fourth aspect of the invention, the oscillation device can output a highly stable high frequency signal by using each oscillation output of the oscillation circuit of the phase locked loop configuration and the fixed frequency oscillator.

According to the fifth aspect of the invention, the oscillation device can output a more stable desired high frequency signal by using the oscillation outputs of the two fixed frequency oscillators.

[0022]

EXAMPLES Example 1. An embodiment of the invention of claim 1 will be described below with reference to the drawings. In FIG. 1, 1 is a voltage controlled oscillator, 3 is a phase locked control circuit for controlling the voltage controlled oscillator 1, 6 is a stable fixed frequency oscillator, 7 is an output signal of the fixed frequency oscillator 6 and an output of the voltage controlled oscillator 1. It is a multiplication circuit that multiplies a signal and creates the sum and difference frequencies thereof.

Further, 8a is a first filter for extracting a signal of a sum frequency from the output signal of the multiplication circuit 7, and 8b is a second filter for extracting a signal of a difference frequency from the output signal of the multiplication circuit 7. 5 is an output terminal.

Next, the operation will be described. First, when the outputs of the voltage controlled oscillator 1 and the fixed frequency oscillator 6 are input to the multiplication circuit 7, signals of the sum and difference frequencies of the output frequencies of the two oscillators 1 and 6 are obtained.

The signal of the sum frequency is the first
The signal having the difference frequency is extracted from the filter 8a and output to the output terminal 5, and the signal having the difference frequency is extracted from the second filter 8b and input to the phase synchronization control circuit 3. Then, with the output voltage of this phase synchronization control circuit 3, the voltage controlled oscillator 1
Is controlled.

Example 2. Next, an embodiment of the invention of claim 2 will be described with reference to the drawings. In FIG. 2, 1a and 1b
Is a voltage controlled oscillator, 2a and 2b are distributors, 3a and 3b are phase synchronization control circuits, 7 is a multiplication circuit, 8 is a filter, and 5 is an output terminal.

Next, the operation will be described. First, the oscillation output of the voltage controlled oscillator 1a is distributed by the distributor 2a, one of which is input to the multiplication circuit 7 and the other of which is input to the phase synchronization control circuit 3
Input to a. The phase locked control circuit 3a controls the voltage controlled oscillator 1a, and the oscillation output thereof is highly stabilized.

On the other hand, the voltage controlled oscillator 1b and the distributor 2
b and the phase synchronization control circuit 3b operate similarly to the above, and
The multiplying circuit 7 to which the output signals of the two voltage controlled oscillators 1a and 1b are input produces signals of the sum and difference frequencies thereof, but the filter 8 takes out the signal of the sum frequency and outputs it from the output terminal 5. To do. In this way, a high frequency signal can be stably obtained.

Example 3. Although the stable fixed frequency oscillator 6 is used in the first embodiment, an oscillator stabilized by a phase locked loop may be used instead of the fixed frequency oscillator 6. FIG. 3 shows this embodiment, and instead of the fixed frequency oscillator 6, a phase locked loop using a voltage controlled oscillator (first voltage controlled oscillator) 1c, a distributor 2c, and a phase locked control circuit 3c is used. As a result, a more stable oscillation signal can be output.

Example 4. Further, although the two oscillators stabilized by the phase locked loop are used in the second embodiment, as shown in FIG. 4, the voltage controlled oscillator 1e, which is one of the oscillators with the phase locked loop, and the distributor. Instead of 2e and the phase synchronization control circuit 3e, a fixed frequency oscillator 6 having a stable frequency may be used. Thereby, a high-frequency signal with high stability can be output with a simple configuration.

Example 5. Further, in the second embodiment, the one using the voltage controlled oscillators 1a and 1b, the distributors 2a and 2b, and the phase locked control circuits 3a and 3b which constitute two oscillators stabilized by the phase locked loop is shown. As shown in FIG. 5, these may be replaced with two fixed frequency oscillators 6a and 6b whose frequencies are stable. According to this, the configuration is further simplified, and a stable high frequency signal can be output.

[0032]

As described above, according to the first aspect of the present invention, the multiplication for outputting the signals of the sum and the difference of the oscillation frequency of the fixed frequency oscillator and the oscillation frequency of the voltage controlled oscillator forming the phase locked loop. A circuit, a first filter for extracting a signal of a sum frequency output from the multiplication circuit, a second filter for extracting a signal of a difference frequency output from the multiplication circuit, and the second filter. Since the phase-locked control circuit is configured to control the oscillation frequency of the voltage-controlled oscillator based on the difference frequency signal extracted from the wave filter,
The circuit configuration is simple and the frequency can be easily adjusted.The output frequency of the voltage controlled oscillator and the frequency of the signal input to the phase locked loop control circuit can be made lower than the output frequency of the oscillator circuit. There is an effect that what can be realized is obtained.

According to the invention of claim 2, the voltage controlled oscillator, the distributor for distributing the oscillated output of the voltage controlled oscillator, and the oscillation of the voltage controlled oscillator based on one of the oscillated outputs outputted from the distributor. Two systems of phase-locked loops consisting of a phase-locked control circuit for controlling the output are provided, and signals of the sum and difference frequencies of the other oscillation outputs output from the distributors of these two systems are output from the multiplication circuit, Since the filter is configured to take out the signal of the sum frequency from the multiplication circuit and output it, the sum frequency signal is obtained while stabilizing the oscillation frequency of the voltage controlled oscillator by the signal of the difference frequency. There is an effect that a desired high frequency signal can be output.

According to the invention of claim 3, the first voltage controlled oscillator, the distributor for distributing the oscillation output of the first voltage controlled oscillator, and one of the oscillation outputs outputted from the distributor A first phase-locked control circuit that controls the oscillation output of the first voltage-controlled oscillator, and a signal of the sum and difference of the other oscillation frequency and the oscillation frequency of the second voltage-controlled oscillator that are output from the distributor. Based on the multiplication circuit that outputs the signal and the difference frequency signal output by the multiplication circuit,
Since the second phase-locked control circuit is configured to control the oscillation frequency of the second voltage-controlled oscillator, it is possible to input a stable oscillation frequency to the multiplication circuit in the phase-locked loop, and thus to obtain the high-frequency signal obtained. There is an effect that a highly stable product can be obtained.

According to the invention of claim 4, a phase synchronization control circuit for controlling the oscillation output of the voltage controlled oscillator based on one oscillation output from the distributor, the oscillation frequency of the fixed frequency oscillator and the distributor. Since a multiplication circuit that outputs a signal of the sum and difference frequency of the other oscillation frequency output from is provided and the filter is configured to take out and output the sum frequency signal output from the multiplication circuit. ,
There is an effect that a high-stability high-frequency signal can be output from each oscillation output of the fixed-frequency oscillator and the oscillation frequency of the phase-locked loop.

According to the fifth aspect of the present invention, a multiplying circuit for outputting a signal of the sum and difference frequencies of the oscillation outputs of the first fixed frequency oscillator and the second fixed frequency oscillator is provided, and by the filter, Since the signal of the above sum frequency is taken out from the multiplication circuit and outputted, a highly stable expected high frequency signal can be output based on the oscillation outputs of the two fixed frequency oscillators. effective.

[Brief description of drawings]

FIG. 1 is a block diagram showing an oscillator according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an oscillating device according to an embodiment of the present invention.

FIG. 3 is a block diagram showing an oscillating device according to an embodiment of the present invention.

FIG. 4 is a block diagram showing an oscillating device according to an embodiment of the invention of claim 4;

FIG. 5 is a block diagram showing an oscillating device according to an embodiment of the present invention.

FIG. 6 is a block diagram showing a conventional oscillator.

[Explanation of symbols]

 1, 1a, 1b, 1e Voltage-controlled oscillator 1c Voltage-controlled oscillator (first voltage-controlled oscillator) 1d Voltage-controlled oscillator (second voltage-controlled oscillator) 2a, 2b, 2c, 2e Distributor 3, 3a, 3b, 3e Phase synchronization control circuit 3c Phase synchronization control circuit (first phase synchronization control circuit) 3d Phase synchronization control circuit (second phase synchronization control circuit) 6 Fixed frequency oscillator 6a Fixed frequency oscillator (first fixed frequency oscillator) 6b Fixed Frequency oscillator (second fixed frequency oscillator) 7 Multiplier circuit 8 Filter 8a First filter 8b Second filter

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[Procedure amendment]

[Submission date] July 26, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

It is an object of the present invention to obtain an oscillating device capable of outputting a highly stable high frequency signal by using each oscillating output of a fixed frequency oscillator and an oscillating circuit of a phase locked loop configuration.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

[0011] The invention of claim 5 By using the oscillation output of the fixed frequency oscillator of the two systems, and to obtain an oscillator capable of outputting a stable high-frequency signal.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

In the oscillator according to the invention of claim 2, two systems of the oscillation circuit having the phase-locked loop structure are prepared, and the signal of the sum frequency of these oscillation outputs can be output as a high frequency signal, and each oscillation output is Distributor by distributor
One of the distributed output signals functions to keep the output frequency of the voltage controlled oscillator of each system constant through the phase synchronization control circuit.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction content]

The oscillating device in the invention of claim 5, by using the respective oscillation output of the fixed frequency oscillator of the two systems, to allow the output of the desired high-frequency signal was safe <br/> boss.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0033

[Correction method] Change

[Correction content]

According to the invention of claim 2, the voltage controlled oscillator, the distributor for distributing the oscillated output of the voltage controlled oscillator, and the oscillation of the voltage controlled oscillator based on one of the oscillated outputs outputted from the distributor. Two systems of phase-locked loops consisting of a phase-locked control circuit for controlling the output are provided, and signals of the sum and difference frequencies of the other oscillation outputs output from the distributors of these two systems are output from the multiplication circuit, Since the filter is configured to take out the signal of the sum frequency from the multiplying circuit and output it, the output from each distributor is
There is an effect that a sum frequency signal can be output as a desired high frequency signal while the oscillation frequency of each voltage controlled oscillator is stabilized by the one oscillation output signal .

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Change

[Correction content]

According to the fifth aspect of the present invention, a multiplying circuit for outputting a signal of the sum and difference frequencies of the oscillation outputs of the first fixed frequency oscillator and the second fixed frequency oscillator is provided, and by the filter, since consisted該掛calculation circuit so as to output the removed signal of the frequency of the sum, based on the oscillation output of the fixed frequency oscillator of the two systems, which can output a high expected frequency signal of stability can be obtained effects There is.

Claims (5)

[Claims] 1. A fixed frequency oscillator having a stable oscillation frequency, and a multiplication circuit for outputting a signal having a sum and a difference of the oscillation frequency of the fixed frequency oscillator and the oscillation frequency of a voltage controlled oscillator forming a phase locked loop. A first filter for extracting and outputting a signal of a sum frequency output by the multiplying circuit, a second filter for extracting and outputting a signal of a difference frequency output by the multiplying circuit, and the phase An oscillating device comprising a phase-locking control circuit which constitutes a loop and controls the oscillating frequency of the voltage controlled oscillator based on the signal of the difference frequency extracted from the second filter. 2. A voltage-controlled oscillator, a distributor for distributing an oscillating output of the voltage-controlled oscillator, and a phase-locking control circuit for controlling an oscillating output of the voltage-controlled oscillator based on one of the oscillating outputs outputted from the distributor. And a multiplication circuit that provides two systems of the phase synchronization loop and outputs a signal of a frequency of a sum and a difference of the other oscillation output output from the distributors of these two systems, and the multiplication circuit. And a filter for extracting and outputting a signal of the above sum frequency from. 3. A first voltage-controlled oscillator, a distributor for distributing the oscillation output of the first voltage-controlled oscillator, and one of the oscillation outputs of the first voltage-controlled oscillator based on the one oscillation output output from the distributor. A first phase locked loop control circuit for controlling the oscillation output; a multiplication circuit for outputting a signal having a sum and a difference of the other oscillation frequency output from the distributor and the oscillation frequency of the second voltage controlled oscillator; A first filter that extracts and outputs a signal of a sum frequency output by the multiplication circuit; a second filter that extracts and outputs a signal of a difference frequency output by the multiplication circuit; An oscillating device comprising: a second phase-locking control circuit for controlling the oscillating frequency of the second voltage-controlled oscillator based on the signal of the difference frequency extracted from the second filter. 4. A distributor for distributing the oscillation output of the voltage controlled oscillator, a phase synchronization control circuit for controlling the oscillation output of the voltage controlled oscillator based on one of the oscillation outputs outputted from the distributor, and an oscillation frequency. Is a stable fixed frequency oscillator, a multiplication circuit that outputs a signal of a frequency that is the sum and difference of the oscillation frequency of the fixed frequency oscillator and the other oscillation frequency output from the distributor, and the sum of the sum output by the multiplication circuit. An oscillating device having a filter for extracting and outputting a frequency signal. 5. A first fixed frequency oscillator and a second fixed frequency oscillator, the oscillation frequencies of which are stable, and a sum and difference frequencies of respective oscillation outputs of the first fixed frequency oscillator and the second fixed frequency oscillator. An oscillating device comprising: a multiplication circuit that outputs a signal; and a filter that extracts and outputs the signal of the sum frequency from the multiplication circuit.