WO2000027026A2 - Combined cmos mixer and circuit - Google Patents
Combined cmos mixer and circuit Download PDFInfo
- Publication number
- WO2000027026A2 WO2000027026A2 PCT/EP1999/008339 EP9908339W WO0027026A2 WO 2000027026 A2 WO2000027026 A2 WO 2000027026A2 EP 9908339 W EP9908339 W EP 9908339W WO 0027026 A2 WO0027026 A2 WO 0027026A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- oscillator
- mixer
- supply terminal
- transistor
- coupled
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/14—Balanced arrangements
- H03D7/1425—Balanced arrangements with transistors
- H03D7/1441—Balanced arrangements with transistors using field-effect transistors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1206—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device using multiple transistors for amplification
- H03B5/1212—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device using multiple transistors for amplification the amplifier comprising a pair of transistors, wherein an output terminal of each being connected to an input terminal of the other, e.g. a cross coupled pair
- H03B5/1215—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device using multiple transistors for amplification the amplifier comprising a pair of transistors, wherein an output terminal of each being connected to an input terminal of the other, e.g. a cross coupled pair the current source or degeneration circuit being in common to both transistors of the pair, e.g. a cross-coupled long-tailed pair
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1228—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier comprising one or more field effect transistors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1237—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator
- H03B5/124—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance
- H03B5/1243—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance the means comprising voltage variable capacitance diodes
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/14—Balanced arrangements
- H03D7/1408—Balanced arrangements with diodes
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B2201/00—Aspects of oscillators relating to varying the frequency of the oscillations
- H03B2201/02—Varying the frequency of the oscillations by electronic means
- H03B2201/0208—Varying the frequency of the oscillations by electronic means the means being an element with a variable capacitance, e.g. capacitance diode
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
- H03D2200/0041—Functional aspects of demodulators
- H03D2200/0084—Lowering the supply voltage and saving power
Definitions
- the invention relates to a mixer-oscillator device comprising an oscillator for generating a local oscillator signal, said oscillator having an oscillator supply terminal, the arrangement further comprises a mixer having a mixer supply terminal, the local oscillator being coupled to the mixer, the mixer further having a signal input for receiving a signal to be mixed with the local oscillator signal.
- the invention relates also to a RF receiver circuit module and to a portable telecommunications device.
- a device according to the preamble is known from the paper sp 23.7 read at the ISSCC97 in session 23 and published at pages 390-391 of the conference proceedings.
- circuitry is often used in various portable electronic telecommunication devices such as telephones and pagers.
- the functionality of the circuit in particular is generally to reduce the frequency of an input signal to a lower value that may even be dc.
- the current consumption of such circuitry is in general relatively large, as being dictated by the requirements of low noise values of the constituent sub-devices. The current drain represented thereby tends to keep battery lifetime and/or stand-alone interval between recharges all too short.
- the invention is characterized in that the oscillator supply terminal is arranged for carrying a local oscillator signal current and a supply current, and in that mixer supply terminal is coupled to the oscillator supply terminal for receiving a supply current and a local oscillator current from said oscillator supply terminal.
- An embodiment of the invention is characterized in that said oscillator supply terminal and said mixer supply terminal are coupled via a main current path of a transistor having a control electrode coupled to a reference voltage input.
- a further embodiment of the invention is characterized in that the oscillator comprises a further oscillator supply terminal being for carrying a local oscillator signal current and a supply current, and in that mixer comprises a further mixer supply terminal being coupled to the further oscillator terminal for receiving a supply current and a local oscillator current from the oscillator supply terminal, and wherein the oscillator signals provided by the first oscillator terminal and the second oscillator terminal have opposite phases.
- Figure 1 a one-chip transceiver concept with mixer & VCO in its front-end section;
- FIG. 2 a CMOS VCO implementation
- Figure 3 a Gilbert cell mixer
- Figure 4 a low-detail schematic of Figures 1 and 2 combined; Figure 5 a comprehensive VCOMX implementation; Figure 6 a varactor tuning circuit; Figure 7 a low-detail schematic of Figure 5.
- Figure 1 represents a one-chip transceiver concept with mixer & VCO in its RF-front-end section 24. Such realization will be useful in an environment for low-cost, wireless, and battery-powered transceivers, such as could be used in portable communication devices such as cellular and cordless telephones, pagers, and other.
- the schematic of Figure 1 has an RF front end 22+24, an RF back end 26 and baseband 28 subsystems.
- the signals picked up by antenna 20 are first amplified by an LNA circuit 22, and then down-convened with one or more mixers MD ⁇ block 24.
- Blocks 19 are band-pass filters, each with a suitable characte ⁇ stic.
- the function of the mixer in question is to convert the input signal into an LF signal with a reduced frequency which even can be zero.
- a conventional mixer topology is the Gilbert cell that has one input port for the RF signal from the LNA, and the other from a VCO or local oscillator that has been tuned exactly to the desired frequency.
- the LO frequency may be higher than (high side injection), lower than (low side injection), or exactly equal to the input RF frequency.
- the current consumption by both the VCO and the mixer is in the milliamps range, as being dictated by the required phase noise/spectrum pu ⁇ ty of the VCO, and the noise figure of the mixer stage, respectively.
- the invention solves to a great extent the disadvantage caused by these relatively large current values
- the inventive circuitry to be desc ⁇ bed more in detail hereinafter forms part of comprehensive circuit module 22 that effects nearly all of the necessary receiver functionality of the portable telecommunications device 36 and which may be realized as a single integrated circuit package
- the telecommunications device will generally take up the output signal from baseband stage 28 in processing stage 32 for further conversion, such as to speech and control signals
- Item 34 is a human interface module that comp ⁇ ses keyboard, display, speech I/O and possibly further functionality.
- Item 30 is a transmitter functionality module that receives signals from processing module 32 for therefrom constructing a feasible transmission signal Generally, this needs reusing va ⁇ ous further elements of the device, such as power supply and antenna For brevity, these further aspects are not recited in detail.
- Figure 2 shows without intended limitation a typical CMOS VCO implementation
- an LCR oscillator circuit connects via resistors R to an approp ⁇ ate power source Vdd.
- Certain other oscillator circuit configurations are feasible as well
- Cross-coupled transistors Ml and M2 connect via current source Iss to ground, thereby providing an approp ⁇ ate current level.
- Figure 3 shows without intended limitation a CMOS-implemenfed Gilbert-cell mixer. In this stand-alone circuit block, the mixer circuit connects via impedances Z to an appropriate power source Vdd.
- a first input mixer stage comprises paired transistors M7 and M8 that are controlled by first complementary input signals RF/VCO and connect via current source Iss to ground, thereby enabling transmission of an appropriate current level, as being further controlled by a second input mixer stage.
- This second input mixer stage comprises four paired transistors M3, M4, M5, M6, each respective pair being arranged in series with one of the transistors of the first stage and each pair being controlled by second complementary input signals VCO RF. In this manner, the output current level on terminals MXout represents the mixing result of the two input signals.
- Figure 4 is a low-detail schematic of Figures 2 and 3 combined, the thick lines indicating the principal current flows.
- the arrows connected to the West and East sides of the mixer stage MX indicate input and output signal directions, respectively.
- IMX and IVCO respectively, draining parallel currents from supply to ground, to wit separately for each one of the two partial circuits VCO and MX.
- Figure 7 a schematic according to the invention has been shown in Figure 7, that is a low-detail schematic of Figure 5.
- the currents that have again been indicated by thick lines flow first through the mixer MX and next through the oscillator VCO, before reaching the ground terminal. Consequently, the supply current is reused. If both partial circuits require indeed identical levels of current, the overall power saving could amount to 50%, by putting the two circuits properly stacked on each other, and designed properly with respect to each other. In practice, the current saving may be less than 50%, such as when one of the two items MX , VCO could in practice do with less current than the other.
- FIG. 5 shows a comprehensive VCOMX implementation according to the invention, as being realized in nMOS transistors. By itself, other MOS-type implementations could be feasible as well.
- transistors Ml, M2 are in positive feedback to create a negative small-signal resistance to ensure initial oscillation start-up and subsequently to provide large-signal amplitude regulation.
- the oscillation frequency can be tuned by virtue of varactors.
- Transistors M3, M4, M5 and M6 form again the double-balanced Gilbert cell stage of Figure 2, together with transistors Ml, M2, M7, M8, which at the same time constitute an LO oscillator.
- the oscillator and the Gilbert cell have now been merged in an inventive manner.
- the RF signals are differentially applied to transistors M3-M6 with their output cross-coupled in similar manner as in Figure 2.
- the oscillator is coupled to the mixer via the transistors M7 and M8. Therefor the source of the transistor M7 is connected to the oscillator supply terminal and the drain of the transistor M7 is connected to the mixer supply terminal.
- the source of the transistor M8 is connected to the further oscillator supply terminal and the drain of the transistor M8 is connected to the further mixer supply terminal.
- a particular function of transistors M7, M8 that now get appropriate biasing by voltage Vbias is to provide necessary isolation between the VCO part and the upper part of the mixer circuit.
- the networks Z may be frequency selective.
- the oscillator is voltage controlled through a varactor tuning circuit as shown in
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Superheterodyne Receivers (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Logic Circuits (AREA)
- Transceivers (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99971593A EP1145423A2 (en) | 1998-11-04 | 1999-11-02 | Combined cmos mixer and vco circuit |
JP2000580297A JP2002529949A (en) | 1998-11-04 | 1999-11-02 | Combined low power CFCMOS mixer and VCO reusing current |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98203720.2 | 1998-11-04 | ||
EP98203720 | 1998-11-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2000027026A2 true WO2000027026A2 (en) | 2000-05-11 |
WO2000027026A3 WO2000027026A3 (en) | 2001-10-04 |
Family
ID=8234296
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1999/008339 WO2000027026A2 (en) | 1998-11-04 | 1999-11-02 | Combined cmos mixer and circuit |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1145423A2 (en) |
JP (1) | JP2002529949A (en) |
WO (1) | WO2000027026A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8736392B2 (en) | 2009-03-18 | 2014-05-27 | Qualcomm Incorporated | Transformer-based CMOS oscillators |
CN106208979A (en) * | 2015-05-28 | 2016-12-07 | 三菱电机株式会社 | Multistage amplifier |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8031019B2 (en) * | 2009-02-02 | 2011-10-04 | Qualcomm Incorporated | Integrated voltage-controlled oscillator circuits |
JP2015082720A (en) * | 2013-10-22 | 2015-04-27 | 株式会社デンソー | Oscillator and signal processing circuit |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2008881A (en) * | 1977-11-28 | 1979-06-06 | Tokyo Shibaura Electric Co | Frequency converting circuit |
EP0120543A1 (en) * | 1983-03-29 | 1984-10-03 | Koninklijke Philips Electronics N.V. | Tunable receiver input circuit |
US5715532A (en) * | 1995-01-24 | 1998-02-03 | Matsushita Electric Industrial, Co. | Frequency converter apparatus with distortion compensating circuit |
EP0853373A1 (en) * | 1997-01-11 | 1998-07-15 | Plessey Semiconductors Limited | Double balanced mixer |
-
1999
- 1999-11-02 EP EP99971593A patent/EP1145423A2/en not_active Withdrawn
- 1999-11-02 JP JP2000580297A patent/JP2002529949A/en not_active Withdrawn
- 1999-11-02 WO PCT/EP1999/008339 patent/WO2000027026A2/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2008881A (en) * | 1977-11-28 | 1979-06-06 | Tokyo Shibaura Electric Co | Frequency converting circuit |
EP0120543A1 (en) * | 1983-03-29 | 1984-10-03 | Koninklijke Philips Electronics N.V. | Tunable receiver input circuit |
US5715532A (en) * | 1995-01-24 | 1998-02-03 | Matsushita Electric Industrial, Co. | Frequency converter apparatus with distortion compensating circuit |
EP0853373A1 (en) * | 1997-01-11 | 1998-07-15 | Plessey Semiconductors Limited | Double balanced mixer |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8736392B2 (en) | 2009-03-18 | 2014-05-27 | Qualcomm Incorporated | Transformer-based CMOS oscillators |
US9461652B2 (en) | 2009-03-18 | 2016-10-04 | Qualcomm Incorporated | Transformer-based CMOS oscillators |
CN106208979A (en) * | 2015-05-28 | 2016-12-07 | 三菱电机株式会社 | Multistage amplifier |
US9871493B2 (en) | 2015-05-28 | 2018-01-16 | Mitsubishi Electric Corporation | Multistage amplifier |
CN106208979B (en) * | 2015-05-28 | 2019-03-08 | 三菱电机株式会社 | Casacade multi-amplifier |
Also Published As
Publication number | Publication date |
---|---|
EP1145423A2 (en) | 2001-10-17 |
JP2002529949A (en) | 2002-09-10 |
WO2000027026A3 (en) | 2001-10-04 |
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