CN203661041U

CN203661041U - Handheld ultra-short wave frequency hopping radio station frequency synthesizer

Info

Publication number: CN203661041U
Application number: CN201420029810.5U
Authority: CN
Inventors: 张小舟; 赵亚东
Original assignee: Chengdu Spaceon Technology Co Ltd
Current assignee: Chengdu Spaceon Technology Co Ltd
Priority date: 2014-01-17
Filing date: 2014-01-17
Publication date: 2014-06-18
Anticipated expiration: 2024-01-17

Abstract

The utility model discloses a handheld ultra-short wave frequency hopping radio station frequency synthesizer including a crystal oscillator, a frequency divider a, a phase discriminator, a loop filter, a first voltage-controlled oscillator, a second voltage-controlled oscillator, a third voltage-controlled oscillator, a frequency divider b and a frequency divider c. The crystal oscillator is connected with the frequency divider a, the phase discriminator and the loop filter successively. The loop filter is connected with the first voltage-controlled oscillator, the second voltage-controlled oscillator and the third voltage-controlled oscillator. Output terminals of the first voltage-controlled oscillator, the second voltage-controlled oscillator and the third voltage-controlled oscillator are connected with the frequency divider b respectively. The frequency divider b is connected with the frequency divider c. The output terminal of the frequency c is also connected with an input terminal of the phase discriminator. The handheld ultra-short wave frequency hopping radio station frequency synthesizer is high in frequency stability, small in size, easy to integrate, wide in frequency band and long in communication range. Since the frequency synthesizer is inside provided with the multiple voltage-controlled oscillators, circuit redundancy is reduced.

Description

A kind of hand-hold type Frequency Synthesizer for VHF Band Frequency Hopping Radio

Technical field

The utility model relates to a kind of direct frequency synthesizer, particularly a kind of hand-hold type Frequency Synthesizer for VHF Band Frequency Hopping Radio.

Background technology

Frequency synthesis technique, refers to from the reference frequency of a high stability and accuracy, through various technical finesses, generates a large amount of discrete frequency output.Frequency synthesizer is by the standard reference frequency of a high accuracy and high stable, through means such as mixing, frequency multiplication, frequency division, to it add, subtract, multiplication and division arithmetic, finally produce a large amount of have same accuracy and stability frequency sources.

And frequency synthesizer is to utilize one or more standard signals, produce the equipment of a large amount of discrete frequency signals by various technological approaches, Direct Digital frequency synthesis technique is after direct frequency synthesis and indirect frequency synthesis, the third generation frequency synthesis technique developing rapidly along with the development of digital integrated circuit and microelectric technique.The effect of frequency synthesizer is the frequency reference signal that certain resolving power is provided to microwave sweep signal, and microwave signal output frequency is carried out to pointwise locking, to obtain the frequency sweep output signal of high accuracy and stability.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of frequency stability high, and volume is little, be easy to integratedly, frequency range is wide, and communication distance is far away, inside establish multiple voltage controlled oscillators, reduce the hand-hold type Frequency Synthesizer for VHF Band Frequency Hopping Radio of circuit redundancy.

The purpose of this utility model is achieved through the following technical solutions: a kind of hand-hold type Frequency Synthesizer for VHF Band Frequency Hopping Radio, it comprises crystal oscillator, frequency divider a, phase discriminator, loop filter, the first voltage controlled oscillator, the second voltage controlled oscillator, the 3rd voltage controlled oscillator, frequency divider b and frequency divider c, crystal oscillator and frequency divider a, phase discriminator, loop filter connects in turn, loop filter respectively with the first voltage controlled oscillator, the second voltage controlled oscillator and the 3rd voltage controlled oscillator connect, the output of the first described voltage controlled oscillator and the output of the second voltage controlled oscillator, the output of the 3rd voltage controlled oscillator is connected with frequency divider b respectively, frequency divider b is also connected with frequency divider c, the output of described frequency divider c is also connected with the input of phase discriminator.

It also includes FPGA control circuit, and the control output of FPGA control circuit is connected with the control inputs of frequency divider a, frequency divider b, frequency divider c, the first voltage controlled oscillator, the second voltage controlled oscillator and the 3rd voltage controlled oscillator respectively.

The frequency range that it comprises is 968.3MHz～1268.3MHz.

The utlity model has following advantage:

1, provide a kind of miniature frequency synthesizer, frequency stability is high, and volume is little, is easy to integrated;

2, frequency range is wide, and communication distance is far away, covers VHF, uhf band, meets empty command and guide normal operating mode;

3, in, establish multiple voltage controlled oscillators, effectively reduce circuit redundancy, dwindled volume, greatly saved space.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

Embodiment

Below in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail, but protection range of the present utility model is not limited to the following stated.

As shown in Figure 1, a kind of hand-hold type Frequency Synthesizer for VHF Band Frequency Hopping Radio, it comprises crystal oscillator, frequency divider a, phase discriminator, loop filter, the first voltage controlled oscillator, the second voltage controlled oscillator, the 3rd voltage controlled oscillator, frequency divider b and frequency divider c, crystal oscillator and frequency divider a, phase discriminator, loop filter connects in turn, loop filter respectively with the first voltage controlled oscillator, the second voltage controlled oscillator and the 3rd voltage controlled oscillator connect, the output of the first described voltage controlled oscillator and the output of the second voltage controlled oscillator, the output of the 3rd voltage controlled oscillator is connected with frequency divider b respectively, frequency divider b is also connected with frequency divider c, the output of described frequency divider c is also connected with the input of phase discriminator.

The frequency range that it comprises is 968.3MHz～1268.3MHz.

In the time working in hand-hold type radio station, control circuit is selected the low voltage controlled oscillator of making an uproar mutually according to corresponding frequency, after the frequency of voltage controlled oscillator output is processed by frequency divider b, frequency divider c, the stabilized frequency being divided into by frequency divider a after crystal oscillator is sent in phase discriminator and is processed, and the error voltage obtaining after processing is controlled the output frequency of voltage controlled oscillator after loop filter filtering.

Claims

1. a hand-hold type Frequency Synthesizer for VHF Band Frequency Hopping Radio, it is characterized in that: it comprises crystal oscillator, frequency divider a, phase discriminator, loop filter, the first voltage controlled oscillator, the second voltage controlled oscillator, the 3rd voltage controlled oscillator, frequency divider b and frequency divider c, crystal oscillator and frequency divider a, phase discriminator, loop filter connects in turn, loop filter respectively with the first voltage controlled oscillator, the second voltage controlled oscillator and the 3rd voltage controlled oscillator connect, the output of the first described voltage controlled oscillator and the output of the second voltage controlled oscillator, the output of the 3rd voltage controlled oscillator is connected with frequency divider b respectively, frequency divider b is also connected with frequency divider c, the output of described frequency divider c is also connected with the input of phase discriminator.

2. a kind of hand-hold type Frequency Synthesizer for VHF Band Frequency Hopping Radio according to claim 1, it is characterized in that: it also includes FPGA control circuit, the control output of FPGA control circuit is connected with the control inputs of frequency divider a, frequency divider b, frequency divider c, the first voltage controlled oscillator, the second voltage controlled oscillator and the 3rd voltage controlled oscillator respectively.

3. a kind of hand-hold type Frequency Synthesizer for VHF Band Frequency Hopping Radio according to claim 1, is characterized in that: the frequency range that it comprises is 968.3MHz～1268.3MHz.