CN205490425U - Single balanced mixer circuit module - Google Patents

Abstract

The utility model discloses a single balanced mixer circuit module, including radio frequency signal input interface P1, local oscillator signal input interface P2, triode Q1, triode Q2, triode Q3, input radio frequency transformer T2, output radio frequency transformer T1 and intermediate frequency signal output interface P3, triode Q1's base is met with radio frequency signal input interface P1's a pin through electric capacity C1, input radio frequency transformer T2's primary's one end is met through electric capacity C4 and local oscillator signal input interface P2's a pin, and triode Q2's base and triode Q3's base are met with input radio frequency transformer T2's secondary coil's both ends respectively, and intermediate frequency signal output interface P3's a pin meets with the secondary coil's that exports radio frequency transformer T1 one end through electric capacity C2. The utility model discloses can provide suitable gain, the linearity is good, and the operational reliability is high, can the wide application arrive in test of all kinds of radio frequencies and the analytical equipment.

Description

A kind of single balance mixer circuit module

Technical field

This utility model belongs to radio circuit technical field, is specifically related to a kind of single balance mixer circuit Module.

Background technology

Frequency mixer is radio frequency and most basic and wide variety of microwave circuit functional unit in microwave system, Frequency mixer is generally divided into passive and active two kinds of designs, and wherein, the passive frequency mixer linearity is preferable, But not being provided that gain, therefore, the application scenario of passive frequency mixer receives greatly restriction；Active Frequency mixer with low cost, using the teaching of the invention it is possible to provide certain gain, is of value to the noiseproof feature of complete machine, extensively It is applied in all kinds of consumer electronics product.In time using multiple active devices to constitute frequency mixer, its Performance indications significantly improve than single active device, are mainly manifested in the linearity, the suppression energy to harmonic wave Power, to rejection ability of local oscillator etc., the input signal of balanced mixer often uses differential mode, This mode has higher interference rejection capability than single active device, when performance requirement is higher, extensively General employing balanced mixer；But, prior art also lacks circuit structure simple, reasonable in design, Realize convenient and low cost, be provided that suitable gain, the linearity is good, functional reliability is high, application The single balance mixer circuit module that scope is wide.

Utility model content

Technical problem to be solved in the utility model is, for above-mentioned deficiency of the prior art, to carry For a kind of single balance mixer circuit module, its circuit structure is simple, reasonable in design, it is achieved convenient and Low cost, is provided that suitable gain, and the linearity is good, and functional reliability is high, applied range, real Strong by property, it is possible to be widely applied in all kinds of radio frequency testing and analytical equipment.

For solving above-mentioned technical problem, the technical solution adopted in the utility model is: a kind of singly balanced mixing Device circuit module, it is characterised in that: include radiofrequency signal input interface P1, local oscillation signal input interface P2, Audion Q1, audion Q2, audion Q3, input radio frequency transformator T2, output radio-frequency transformer T1 With intermediate-freuqncy signal output interface P3, described radiofrequency signal input interface P1, local oscillation signal input interface P2 Be the interface with two pins with intermediate-freuqncy signal output interface P3, the base stage of described audion Q1 is led to The pin crossing electric capacity C1 and radiofrequency signal input interface P1 connects, described radiofrequency signal input interface Another pin ground connection of P1, the emitter stage of described audion Q1 is defeated by resistance R1 and-8V power supply Go out end to connect；One end of the primary coil of described input radio frequency transformator T2 is believed with local oscillator by electric capacity C4 One pin of number input interface P2 connects, and another pin of described local oscillation signal input interface P2 connects Ground, the other end ground connection of the primary coil of described input radio frequency transformator T2, the base of described audion Q2 The base stage of pole and audion Q3 two ends with the secondary coil of input radio frequency transformator T2 respectively connect, institute State the centre tap ground connection of the secondary coil of input radio frequency transformator T2, the emitter stage of described audion Q2 All colelctor electrodes with audion Q1 connect with the emitter stage of audion Q3, the colelctor electrode of described audion Q2 Two ends with the primary coil of output radio-frequency transformer T1 are connected respectively with the colelctor electrode of audion Q3, institute The centre tap of primary coil stating output radio-frequency transformer T1 connects with the outfan of+8V power supply, described One pin of intermediate-freuqncy signal output interface P3 is by the secondary wire of electric capacity C2 with output radio-frequency transformer T1 One end of circle connects, another pin ground connection of described intermediate-freuqncy signal output interface P3, described output radio frequency The other end ground connection of the secondary coil of transformator T1.

Above-mentioned a kind of single balance mixer circuit module, it is characterised in that: described output radio frequency transformation The centre tap of the primary coil of device T1 is also by electric capacity C5 in parallel and electric capacity C6 ground connection.

Above-mentioned a kind of single balance mixer circuit module, it is characterised in that: described input radio frequency transformation The model of device T2 and output radio-frequency transformer T1 is ADT16_1T.

Above-mentioned a kind of single balance mixer circuit module, it is characterised in that: described audion Q1, three The model of pole pipe Q2 and audion Q3 is 2SC1906.

This utility model compared with prior art has the advantage that

1, circuit structure of the present utility model is simple, reasonable in design, it is achieved convenient and low cost.

2, this utility model make use of that audion Q1, audion Q2 and audion Q3's is non-linear, Radio-frequency input signals is 1M～100MHz, from audion Q1 input, local oscillator input signals be 1M～ 100MHz, from audion Q2 and audion Q3 Differential Input, intermediate frequency is output as 0～200MHz, becomes Frequently gain about 10dB, electric capacity C1 be radio frequency input capacitance, electric capacity C4 be local oscillator input every Straight electric capacity, electric capacity C5 and electric capacity C6 is power supply decoupling capacitance, and electric capacity C2 is intermediate frequency output coupling electricity Holding, the linearity is good, and functional reliability is high.

3, applied range of the present utility model, practical, it is possible to is widely applied to all kinds of radio frequency In test and analytical equipment.

In sum, circuit structure of the present utility model is simple, reasonable in design, it is achieved convenient and cost Low, it is provided that suitable gain, the linearity is good, and functional reliability is high, applied range, practicality By force, it is possible to be widely applied in all kinds of radio frequency testing and analytical equipment.

Below by drawings and Examples, the technical solution of the utility model is done and further retouches in detail State.

Accompanying drawing explanation

Fig. 1 is circuit theory diagrams of the present utility model.

Detailed description of the invention

As it is shown in figure 1, single balance mixer circuit module of the present utility model, defeated including radiofrequency signal Incoming interface P1, local oscillation signal input interface P2, audion Q1, audion Q2, audion Q3, defeated Enter radio-frequency transformer T2, output radio-frequency transformer T1 and intermediate-freuqncy signal output interface P3, described radio frequency Signal input interface P1, local oscillation signal input interface P2 and intermediate-freuqncy signal output interface P3 are and have The interface of two pins, the base stage of described audion Q1 is by electric capacity C1 and radiofrequency signal input interface One pin of P1 connects, another pin ground connection of described radiofrequency signal input interface P1, described The emitter stage of audion Q1 is connected by the outfan of resistance R1 and-8V power supply；Described input radio frequency One end of the primary coil of transformator T2 is by one of electric capacity C4 and local oscillation signal input interface P2 Pin connects, another pin ground connection of described local oscillation signal input interface P2, described input radio frequency The other end ground connection of the primary coil of transformator T2, the base stage of described audion Q2 and audion Q3 Base stage two ends with the secondary coil of input radio frequency transformator T2 respectively connect, described input radio frequency The centre tap ground connection of the secondary coil of transformator T2, the emitter stage of described audion Q2 and audion The emitter stage of Q3 all colelctor electrodes with audion Q1 connect, the colelctor electrode of described audion Q2 and three poles The colelctor electrode of the pipe Q3 two ends of primary coil with output radio-frequency transformer T1 respectively are connected, described defeated The centre tap of primary coil going out radio-frequency transformer T1 connects with the outfan of+8V power supply, described in Frequently a pin of signal output interface P3 is by the secondary of electric capacity C2 with output radio-frequency transformer T1 One end of coil connects, another pin ground connection of described intermediate-freuqncy signal output interface P3, described defeated Go out the other end ground connection of the secondary coil of radio-frequency transformer T1.

As it is shown in figure 1, in the present embodiment, the centre of the primary coil of described output radio-frequency transformer T1 Tap is also by electric capacity C5 in parallel and electric capacity C6 ground connection.

In the present embodiment, the model of described input radio frequency transformator T2 and output radio-frequency transformer T1 is equal For ADT16_1T.

In the present embodiment, the model of described audion Q1, audion Q2 and audion Q3 is 2SC1906。

This utility model have employed model and is the audion Q1 of 2SC1906, audion Q2 and three poles Pipe Q3 devises a kind of single balance mixer circuit module, make use of audion Q1, audion Q2 Non-linear with audion Q3, radio-frequency input signals is 1M～100MHz, inputs from audion Q1, Local oscillator input signals is 1M～100MHz, and from audion Q2 and audion Q3 Differential Input, intermediate frequency is defeated Going out is 0～200MHz, and conversion gain about 10dB, electric capacity C1 are that radio frequency inputs capacitance, electricity Holding C4 is that local oscillator inputs capacitance, and electric capacity C5 and electric capacity C6 is power supply decoupling capacitance, electric capacity C2 For intermediate frequency output coupling capacitor, the linearity is good, and functional reliability is high, practical, it is possible to extensively should Use in all kinds of radio frequency testing and analytical equipment.

The above, be only preferred embodiment of the present utility model, not makees this utility model any Limit, every according to this utility model technical spirit, above example is made any simple modification, Change and equivalent structure change, all still fall within the protection domain of technical solutions of the utility model.

Claims (4)

1. a single balance mixer circuit module, it is characterised in that: include radiofrequency signal input interface P1, local oscillation signal input interface P2, audion Q1, audion Q2, audion Q3, input radio frequency Transformator T2, output radio-frequency transformer T1 and intermediate-freuqncy signal output interface P3, described radiofrequency signal is defeated Incoming interface P1, local oscillation signal input interface P2 and intermediate-freuqncy signal output interface P3 are to be had two and draws The interface of foot, the base stage of described audion Q1 is by electric capacity C1 and radiofrequency signal input interface P1's One pin connects, another pin ground connection of described radiofrequency signal input interface P1, described three poles The emitter stage of pipe Q1 is connected by the outfan of resistance R1 and-8V power supply；Described input radio frequency transformation One end of the primary coil of device T2 is by a pin of electric capacity C4 and local oscillation signal input interface P2 Connect, another pin ground connection of described local oscillation signal input interface P2, described input radio frequency transformation The other end ground connection of the primary coil of device T2, the base stage of described audion Q2 and the base of audion Q3 Two ends with the secondary coil of input radio frequency transformator T2 respectively, pole connect, described input radio frequency transformation The centre tap ground connection of the secondary coil of device T2, the emitter stage of described audion Q2 and audion Q3 Emitter stage all colelctor electrodes with audion Q1 connect, the colelctor electrode of described audion Q2 and audion The colelctor electrode of the Q3 two ends of primary coil with output radio-frequency transformer T1 respectively are connected, described output The centre tap of the primary coil of radio-frequency transformer T1 connects with the outfan of+8V power supply, described intermediate frequency One pin of signal output interface P3 is by the secondary wire of electric capacity C2 with output radio-frequency transformer T1 One end of circle connects, another pin ground connection of described intermediate-freuqncy signal output interface P3, described output The other end ground connection of the secondary coil of radio-frequency transformer T1.

2. according to a kind of single balance mixer circuit module described in claim 1, it is characterised in that: The centre tap of the primary coil of described output radio-frequency transformer T1 is also by electric capacity C5 in parallel and electricity Hold C6 ground connection.

3. according to a kind of single balance mixer circuit module described in claim 1, it is characterised in that: The model of described input radio frequency transformator T2 and output radio-frequency transformer T1 is ADT16_1T.

4. according to a kind of single balance mixer circuit module described in claim 1, it is characterised in that: The model of described audion Q1, audion Q2 and audion Q3 is 2SC1906.