CN102082579A - Ultralow-power consumption constant-envelope transceiver system and implementation method thereof - Google Patents
Ultralow-power consumption constant-envelope transceiver system and implementation method thereof Download PDFInfo
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- CN102082579A CN102082579A CN2010106206565A CN201010620656A CN102082579A CN 102082579 A CN102082579 A CN 102082579A CN 2010106206565 A CN2010106206565 A CN 2010106206565A CN 201010620656 A CN201010620656 A CN 201010620656A CN 102082579 A CN102082579 A CN 102082579A
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Abstract
The invention discloses an ultralow-power consumption constant-envelope transceiver system and an implementation method thereof. The ultralow-power consumption constant-envelope transceiver system comprises a stacked current duplex module, a passive frequency mixer, an adaptive gain frequency mixer, a reconstructable filter, a peak detection module, a phaselocked loop and a transceiver antenna, wherein the stacked current duplex module is provided with a voltage-controlled oscillator, a frequency divider, a low-noise amplifier and a power amplifier. In the invention, a large number of modules in the transceiver system are integrated, current duplex and module reconstruction are realized at multiple places, a receiver automatically regulates a bias current according to the intensity of a received signal, and thus, the dynamic regulation of power consumption is realized to realize the ultralow power consumption of the entire receiver. Compared with the conventional transceiver system, the system has ultralow power consumption, a simple structure and convenience for design.
Description
Technical field
The invention belongs to wireless communication technology field, relate to wireless communication system transceiver module and radio frequency integrated circuit, be a kind of super low-power consumption constant envelope receive-transmit system and its implementation.
Background technology
In recent years, under the promotion of portable electric appts such as notebook computer, mobile communication and WSN, GPS develop rapidly, the low-power consumption receive-transmit system has become one of important development direction of radio frequency integrated circuit.The researcher mainly realizes the design of low-power consumption radio frequency integrated circuit from following angle both at home and abroad, first, from changing the angle of technology, as technologies such as employing BiCMOS and multi-Vts, but its cost of these methods is relatively poor than the costliness and the latter's manufacturing again; Second, angle from circuit design technique, under the situation that does not change existing technology, realize the design of low-power consumption radio frequency integrated circuit, as the sub-threshold region operating circuit, floating boom/accurate floating-gate MOS circuit, substrate Driving technique, substrate biasing technique, Self-cascading circuit, level mobile technology, current-mode circuit etc., yet because these technology have the shortcoming of self, so their ranges of application separately are subjected to certain restriction.
Summary of the invention
The technical problem to be solved in the present invention is: existing low-power consumption radio frequency integrated circuit improvement technology cost is expensive, manufacturing is relatively poor, also there are a lot of problems in existing improvement circuit design, range of application is restricted, a kind of super low-power consumption constant envelope receive-transmit system need be provided, comprise and receive and transmitter module, integrate receiving, reduce the power consumption of system with transmitter module.
Technical scheme of the present invention is: a kind of super low-power consumption constant envelope receive-transmit system, comprise stacked current multiplexing module, passive frequency mixer, adaptive gain frequency mixer, restructural filter, phase-locked loop, peak detection block and dual-mode antenna, stacked current multiplexing module is provided with voltage controlled oscillator, frequency divider, low noise amplifier and power amplifier; After baseband signal is passed through the restructural filter under the emission mode of operation, through passive frequency mixer and intrinsic signals mixing, radiofrequency signal after the mixing is through stacked current multiplexing module, by the switching gate voltage controlled oscillator, frequency divider, power amplifier circuit, after dual-mode antenna transmit, radiofrequency signal is through the dual-mode antenna received signal under the reception mode of operation, receive signal through stacked current multiplexing module, by the switching gate voltage controlled oscillator, frequency divider, amplifier circuit in low noise, amplify through adaptive gain frequency mixer and intrinsic signals mixing and to signal, behind the restructural filter, the output intermediate-freuqncy signal, peak detection block is carried out FEEDBACK CONTROL to the adaptive gain frequency mixer
The shared quiescent bias current of the voltage controlled oscillator of wherein stacked current multiplexing module, frequency divider, low noise amplifier and power amplifier is formed the stacked current multiplexing structure of module; In the adaptive gain frequency mixer, at first pass through variable transconductance level, high-pass filtering by the radiofrequency signal that dual-mode antenna receives, pass through mixer stage then, output signal is through behind the low pass filter, turning back to the variable transconductance level amplifies once more to signal, make the mutual conductance amplifying stage obtain twice utilization, dynamic adjustments receive-transmit system power consumption is controlled in peak detection block control to the gain of adaptive gain frequency mixer; The restructural filter is realized by switch control module and two second-order low-pass filters.
The implementation method of above-mentioned super low-power consumption constant envelope receive-transmit system is: the voltage controlled oscillator of stacked current multiplexing module, frequency divider, the shared quiescent bias current of low noise amplifier and power amplifier, when system works during in emission mode, voltage controlled oscillator, frequency divider, shared one road current work of power amplifier, low noise amplifier is not worked, and system works is when receiving mode, voltage controlled oscillator, frequency divider, shared one road current work of low noise amplifier, power amplifier is not worked, frequency divider is shunted voltage controlled oscillator always, final one road electric current of realizing uses for these four modules, realizes low power dissipation design; In the adaptive gain frequency mixer, the transconductance stage of frequency mixer, the radio-frequency voltage signal is converted into radio-frequency current, two balance MOS switches are modulated the radio-frequency current of input, the output intermediate-freuqncy signal, intermediate-freuqncy signal turns back to transconductance stage again through low-pass filtering, signal is further amplified, make trsanscondutance amplifier obtain twice utilization, the mutual conductance amplifying stage adopts source degeneracy structure, peak detection block is according to detected signal strength signal intensity, produce corresponding control voltage, Controlling Source degeneracy resistance value changes the mutual conductance of mutual conductance amplifying stage, also change simultaneously the direct current biasing of circuit, realize the dynamic adjustment of gain-variable and system power dissipation; The restructural filter selects the restructural filter to be operated in low pass pattern or the logical pattern of plural number band by switch control module, realizes the restructural of filter.
The shared bias current of voltage controlled oscillator of the present invention, frequency divider, low noise amplifier and power amplifier; The adaptive gain frequency mixer is partly adopted in the following mixing of receiving unit, gain-variable, signal obtains twice amplification in the transconductance stage of frequency mixer, pass through to adopt the automatic gain structure in transconductance stage simultaneously, change the transconductance stage mutual conductance, realize the effect that variable gain is amplified, the uppermixing of radiating portion adopts passive frequency mixer to reduce power consumption; Receive with the filter of launching and adopt reconfigurable structures,, save the power consumption and the chip area of system by the function of gating switch realization second-order low-pass filter and complex bandpass filters.The present invention improves traditional receive-transmit system structure from optimizing radio system structure angle, and some modules in the system are integrated, and electric current is multiplexing between the realization module, perhaps realizes multiple function with a module.
The present invention has ultralow power consumption with respect to traditional receive-transmit system, and is simple in structure, low noise amplifier and voltage controlled oscillator, shared one road bias current of frequency divider in emission system intermediate power amplifier and the receiving system; Realize down mixing, variable gain by a module, reach current multiplexing; Upper frequency mixer uses the low-power consumption passive frequency mixer; The second order filter of receive-transmit system adopts reconfigurable structures, receive the different bias currents of regulating automatically of signal strength signal intensity according to receiver, regulate the gain size, thereby power consumption is dynamically adjusted, switch comes gating low pass filter or complex bandpass filters, during whole receive-transmit system operate as normal, power consumption only is 3mW.
Description of drawings
Fig. 1 is a super low-power consumption constant envelope receive-transmit system main body circuit block diagram of the present invention.
Fig. 2 is low noise amplifier of the present invention, frequency divider, power amplifier, voltage controlled oscillator current multiplexing schematic diagram.
Fig. 3 is the adaptive gain frequency mixer theory diagram with variable gain, filter function of the present invention.
Fig. 4 is the adaptive gain mixer schematic diagram with variable gain, filter function of the present invention.
Fig. 5 is the passive frequency mixer schematic diagram.
Fig. 6 is the complex filter circuit theory diagrams of restructural filter of the present invention.
Embodiment
The following describes concrete enforcement of the present invention.
As Fig. 1, the present invention includes stacked current multiplexing module 1, passive frequency mixer 2, adaptive gain frequency mixer 3, restructural filter 4, phase-locked loop 5, peak detection block 6 and dual-mode antenna 7, stacked current multiplexing module 1 is provided with voltage controlled oscillator, frequency divider, low noise amplifier and power amplifier; After baseband signal is passed through the restructural filter under the emission mode of operation, through passive frequency mixer and intrinsic signals mixing, radiofrequency signal after the mixing is through stacked current multiplexing module, by the switching gate voltage controlled oscillator, frequency divider, power amplifier circuit, after antenna transmit, radiofrequency signal is through antenna receiving signal under the reception mode of operation, receive signal through stacked current multiplexing module, by the switching gate voltage controlled oscillator, frequency divider, amplifier circuit in low noise, amplify through adaptive gain frequency mixer and intrinsic signals mixing and to signal, behind the restructural filter, the output intermediate-freuqncy signal, peak detection block is carried out FEEDBACK CONTROL to the adaptive gain frequency mixer.
Wherein, as Fig. 2, the voltage controlled oscillator of stacked current multiplexing module 1, frequency divider, low noise amplifier and power amplifier are the module layer stack structure, voltage controlled oscillator, frequency divider and power amplifier are used to transmit, voltage controlled oscillator, frequency divider and low noise amplifier are used for received signal, system transmits and receives shared voltage controlled oscillator and frequency divider, voltage controlled oscillator, frequency divider, low noise amplifier and power amplifier are the shared quiescent bias current of module, form the stacked current multiplexing structure of module.
Frequency mixer generally is made up of 3 parts: transconductance stage, mixer stage and load stage, as Fig. 3, in the adaptive gain frequency mixer 3 of the present invention, at first pass through the variable transconductance level by the radiofrequency signal that dual-mode antenna (7) receives, high-pass filtering, pass through mixer stage then, output signal is through behind the low pass filter, turning back to the variable transconductance level amplifies once more to signal, make the mutual conductance amplifying stage obtain twice utilization, the mutual conductance amplifying stage adopts source degeneracy structure, peak detection block (6) is according to detected signal strength signal intensity, produce corresponding control voltage, Controlling Source degeneracy resistance value changes the mutual conductance of mutual conductance amplifying stage, also change simultaneously the direct current biasing of circuit, realize the dynamic adjustment of gain-variable and system power dissipation; Restructural filter 4 adopts switch control module, selects restructural filter 4 to be operated in low pass pattern or the logical pattern of plural number band.
Because voltage controlled oscillator, frequency divider, low noise amplifier, power amplifier all need big bias current usually, and low noise amplifier and power amplifier are operated in respectively in the reception and emission mode of transceiver system in the receive-transmit system.Voltage controlled oscillator of the present invention, frequency divider, power amplifier, low noise amplifier adopt multimode stacked, the current multiplexing technology, under the emission mode of operation, selector switch S inserts the B place, voltage controlled oscillator, frequency divider, the stacked common current of power amplifier module, and selector switch S inserts A place, voltage controlled oscillator, frequency divider, the stacked common current of low noise amplifier module under the reception mode of operation.Frequency divider is told one part of current according to circuit design to voltage controlled oscillator, and remaining electric current is given low noise amplifier or power amplifier.Low noise amplifier adopts source class inductor degeneration common source and common grid amplifier structure, and this structure realizes input arrowband coupling, utilizes cascodes to improve the isolation of system.Power amplifier also adopts cascodes, and this structure can be used different biasings as required, can be designed to category-A, category-B, C power-like amplifier.Low noise amplifier and power amplifier adopt identical LC load, and this its load form has good selecting frequency characteristic, adopt switched capacitor array to be used for revising the capacitance deviation that technology, temperature, voltage cause, regulate resonance frequency.Voltage controlled oscillator adopts the LC oscillator, by big electric capacity in parallel on low noise amplifier load inductance top, isolates the influence between voltage-controlled amplifier and other two modules.Frequency divider is shunted voltage controlled oscillator always.
As Fig. 4, adaptive gain frequency mixer of the present invention, just the transconductance stage of the down-conversion mixer of receiving unit is by transistor PM0, PM3, NM0, NM1, capacitor C 0, C1, C2, C3, C15, C16, resistance R 1, R2, R3, R4 form, and capacitor C 0, C1, C2, C3, C15, C16 play the effect of short circuit to radio frequency, play simultaneously every straight effect, transconductance stage is converted into the radio frequency input current signal with the radio frequency input voltage signal, and PM0 and NM0 current multiplexing improve mutual conductance.Switching stage is made up of transistor PM4, PM5, PM6, PM7, PM1, PM2 are that switching transistor improves dc bias current, switch control RF electric current is connected to output, carries out multiplication in current field, and the intermediate frequency load stage is by transistor NM2, NM3, resistance R 7, R8, capacitor C 6, C9, C10 form, and load stage adopts the LOCAL FEEDBACK technology, stablizes the output common mode level, capacitor C 6, C9, C10 present big impedance to the short circuit of radio frequency signal communication to intermediate frequency.R5, C7, R6, C8 realizes low-pass first order filter, the filtering radiofrequency signal, the output intermediate-freuqncy signal of logical frequency mixer, intermediate-freuqncy signal is passed through NM0 again, NM1 pipe common source amplifies, at NM0, the drain terminal output intermediate-freuqncy signal of NM1 is because C16, C15 is equivalent to open circuit to intermediate frequency, NM4, NM5 is as NM0, the source class degeneration resistance of NM1 is controlled voltage by changing on the grid, can change the linear resistance of metal-oxide-semiconductor, thereby change NM0, the equivalent transconductance of NM1 pipe, and then the gain of change intermediate frequency amplifier, this control voltage is produced by the RSSI circuit, according to the difference of receiver received signal intensity size, the corresponding control voltage that produces, produce different source class degeneration resistance, can change the circuit quiescent bias current simultaneously, thereby realize the dynamic power consumption of adjusting.Because the input of down-conversion mixer is a radiofrequency signal, and output is intermediate-freuqncy signal, and therefore this adaptive gain frequency mixer does not form feedback at same frequency place signal, and then can not produce stability problem.
Fig. 5 is the passive frequency mixer circuit, adopts two balance MOS switches, is made up of 4 metal-oxide-semiconductors, and the grid level of MOS switch is subjected to the control of difference intrinsic signals, has solved single balance cock mixting circuit and has had the feedthrough of LO to IF.
Second order restructural filter of the present invention, when transceiver is in receiving mode, switch the selection complex bandpass filters by switch, as Fig. 6, be Closing Switch S1-S8, selective channel, radiofrequency signal is by after the quadrature intrinsic down-conversion, " division " takes place in desired signal and image signal on frequency domain, respectively in the imaginary axis each side on the contrary, if there is the filter of a non-imaginary axis symmetry on frequency domain that they are handled, just can the filtering image signal and obtain desired signal, therefore can eliminate the influence of image signal; When transceiver was in emission mode, by cut-off switch S1-S8, whole filter realized the function of second-order low-pass filter, thereby realized the restructural of filter, saved the power consumption of system.
The above only is a better embodiment of the present invention; protection scope of the present invention is not exceeded with above-mentioned execution mode; as long as the equivalence that those of ordinary skills do according to disclosed content is modified or changed, all should include in the protection range of putting down in writing in claims.
Claims (2)
1. super low-power consumption constant envelope receive-transmit system, it is characterized in that comprising stacked current multiplexing module (1), passive frequency mixer (2), adaptive gain frequency mixer (3), restructural filter (4), phase-locked loop (5), peak detection block (6) and dual-mode antenna (7), stacked current multiplexing module (1) is provided with voltage controlled oscillator, frequency divider, low noise amplifier and power amplifier; After baseband signal is passed through restructural filter (4) under the emission mode of operation, through passive frequency mixer (2) and intrinsic signals mixing, radiofrequency signal after the mixing is through stacked current multiplexing module (1), by the switching gate voltage controlled oscillator, frequency divider, power amplifier circuit, after dual-mode antenna (7) transmit, radiofrequency signal is through dual-mode antenna (7) received signal under the reception mode of operation, receive signal through stacked current multiplexing module (1), by the switching gate voltage controlled oscillator, frequency divider, amplifier circuit in low noise, amplify with the intrinsic signals mixing and to signal through adaptive gain frequency mixer (2), behind restructural filter (4), the output intermediate-freuqncy signal, peak detection block (6) is carried out FEEDBACK CONTROL to adaptive gain frequency mixer (3)
The shared quiescent bias current of voltage controlled oscillator, frequency divider, low noise amplifier and the power amplifier of wherein stacked current multiplexing module (1) is formed the stacked current multiplexing structure of module; In the adaptive gain frequency mixer (3), at first pass through variable transconductance level, high-pass filtering by the radiofrequency signal that dual-mode antenna (7) receives, pass through mixer stage then, output signal is through behind the low pass filter, turning back to the variable transconductance level amplifies once more to signal, make the mutual conductance amplifying stage obtain twice utilization, dynamic adjustments receive-transmit system power consumption is controlled in peak detection block (6) control to the gain of adaptive gain frequency mixer; Restructural filter (4) is realized by switch control module and two second-order low-pass filters.
2. the implementation method of the described super low-power consumption constant envelope of claim 1 receive-transmit system, the voltage controlled oscillator that it is characterized in that stacked current multiplexing module, frequency divider, the shared quiescent bias current of low noise amplifier and power amplifier, when system works during in emission mode, voltage controlled oscillator, frequency divider, shared one road current work of power amplifier, low noise amplifier is not worked, and system works is when receiving mode, voltage controlled oscillator, frequency divider, shared one road current work of low noise amplifier, power amplifier is not worked, frequency divider is shunted voltage controlled oscillator always, final one road electric current of realizing uses for these four modules, realizes low power dissipation design; In the adaptive gain frequency mixer (3), the transconductance stage of frequency mixer, the radio-frequency voltage signal is converted into radio-frequency current, two balance MOS switches are modulated the radio-frequency current of input, the output intermediate-freuqncy signal, intermediate-freuqncy signal turns back to transconductance stage again through low-pass filtering, signal is further amplified, make trsanscondutance amplifier obtain twice utilization, the mutual conductance amplifying stage adopts source degeneracy structure, peak detection block is according to detected signal strength signal intensity, produce corresponding control voltage, Controlling Source degeneracy resistance value changes the mutual conductance of mutual conductance amplifying stage, also change simultaneously the direct current biasing of circuit, realize the dynamic adjustment of gain-variable and system power dissipation; Restructural filter (4) selects restructural filter (4) to be operated in low pass pattern or the logical pattern of plural number band by switch control module, realizes the restructural of filter.
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| CN102638240A (en) * | 2012-04-24 | 2012-08-15 | 无锡中科微电子工业技术研究院有限责任公司 | Double-mode type active power filter circuit with adjustable bandwidth |
| CN102684631A (en) * | 2012-05-23 | 2012-09-19 | 东南大学 | Reconfigurable filter circuit for realizing plural filters and low-pass filtering |
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| CN104158508A (en) * | 2014-09-04 | 2014-11-19 | 王少夫 | Low-pass filter circuit |
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