An on-chip millimeter-wave radar multi-mode local oscillator link and control method
Through the design of the on-chip millimeter-wave radar multi-mode local oscillator link, the high-integration distribution network and control switch are adopted to optimize the local oscillator link, solving the problems of complex modes and large area in the existing technology, and achieving compression of chip area and cost reduction.
Patent Information
- Application Number
- CN202210310308.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-03-28
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2042-03-28
AI Technical Summary
In the existing millimeter-wave radar systems, the processing mode of the local oscillator signal is complex and occupies a large area, which increases the chip cost.
The on-chip millimeter-wave radar multi-mode local oscillator link is adopted, including distribution network, amplifier circuit, frequency doubling circuit and control switch. Various working modes are realized through control signals, combined with a high-integrated distribution network design, the local oscillator link is optimized.
While ensuring multi-mode compatibility, the chip area is compressed and the chip cost is reduced.
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Figure CN114740431B_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of millimeter wave radars, and in particular relates to an on-chip millimeter wave radar multi-mode local oscillator link and a control method. Background Art
[0002] Millimeter-wave radar has garnered increasing attention in recent years, with applications in a variety of fields, including automotive electronics, drones, and intelligent surveillance. Local oscillator signals, as key signals in millimeter-wave radar systems, significantly impact both reception and transmission performance. Different millimeter-wave radar usage or testing scenarios require specific processing of the local oscillator signal flow and input and output ports. These processing involves operating or testing modes such as conventional operation, local oscillator reference signal testing, local oscillator link testing, and array radar cascade testing. The implementation of these circuits is often complex, requiring significant chip area and increasing chip cost. Summary of the Invention
[0003] The present invention provides an on-chip millimeter-wave radar multi-mode local oscillator link and control method, which are used to overcome at least one technical problem existing in the prior art.
[0004] According to a first aspect of an embodiment of the present invention, an on-chip millimeter-wave radar multi-mode local oscillator link is provided, comprising a distribution network, a first amplifying circuit, a second amplifying circuit, a third amplifying circuit, a two-selection circuit, a frequency multiplication circuit, and a fourth amplifying circuit; the distribution network is respectively connected to an input end of the first amplifying circuit and an output end of the second amplifying circuit, the output end of the first amplifying circuit is connected to one input end of the two-selection circuit, the other input end of the two-selection circuit is connected to the output end of the third amplifying circuit and the input end of the second amplifying circuit, the output end of the two-selection circuit is connected to the input end of the frequency multiplication circuit, and the output end of the frequency multiplication circuit is connected to the input end of the fourth amplifying circuit; the first amplifying circuit is connected to a control signal S1, the second amplifying circuit is connected to a control signal S2, the third amplifying circuit is connected to a control signal S3, and the two-selection circuit is connected to a control signal S4.
[0005] The distribution network includes a multi-port transformer B1, an N-type MOS transistor M1, an N-type MOS transistor M3, an N-type MOS transistor M5, an N-type MOS transistor M7, a P-type MOS transistor M2, a P-type MOS transistor M4, a P-type MOS transistor M6, a P-type MOS transistor M8, an inverter I1, an inverter I2, a capacitor C1, and a capacitor C2; the multi-port transformer B1 includes a primary coil L1, a first secondary coil L2, and a second secondary coil L3; the two ends of the coil L1 are respectively connected to port a and ground, the two ends of the coil L2 are respectively connected to port b and port e, and the two ends of the coil L3 are respectively connected to port d and port c; the source and drain ends of the N-type MOS transistor M1 and the P-type MOS transistor M2 are respectively connected to port b and voltage V1, and the source and drain ends of the N-type MOS transistor M3 and the P-type MOS transistor M4 are respectively connected to port b and voltage V1. The PMOS transistor M2 and the PMOS transistor M4 are connected to the input terminal of the inverter I1 and the control signal D1, and the NMOS transistor M1 and the NMOS transistor M3 are connected to the output terminal of the inverter I1; the source and drain terminals of the NMOS transistor M5 and the PMOS transistor M6 are connected in parallel and respectively connected to the port e and the voltage V2, the source and drain terminals of the NMOS transistor M7 and the PMOS transistor M8 are connected in parallel and respectively connected to the port d and the voltage V2, the PMOS transistor M6 and the PMOS transistor M8 are connected to the input terminal of the inverter I2 and the control signal D2, and the NMOS transistor M5 and the NMOS transistor M7 are connected to the output terminal of the inverter I2; the two terminals of the capacitor C1 are connected to the voltage V1 and the ground, respectively, and the two terminals of the capacitor C2 are connected to the voltage V2 and the ground.
[0006] The voltage V1 provides a power supply voltage for the second amplifier circuit, and the voltage V2 provides a bias voltage for the first amplifier circuit.
[0007] Preferably, the coil L1 uses two layers of adjacent metal, adopts a regular octagonal symmetrical interwinding form, and the ports are folded on one side; the coils L2 and L3 use another two layers of adjacent metal, adopt a regular octagonal cross-symmetrical interwinding form, and have the same number of turns; the like-name ends of the coil L2 and the non-like-name ends of the coil L3 are folded on the side of the folded port of the coil L1 rotated 90° clockwise, and the non-like-name ends of the coil L2 and the like-name ends of the coil L3 are folded on the side of the folded port of the coil L1 rotated 90° counterclockwise.
[0008] The inputs and outputs of the first amplifying circuit, the second amplifying circuit, the third amplifying circuit, the amplifying circuit 4 and the two-to-one circuit are all differential signals.
[0009] The first amplifying circuit, the second amplifying circuit and the third amplifying circuit respectively realize a shut-down function through control signals S1, S2 and S3.
[0010] The two-choose-one circuit realizes the two-choose-one switching function through the control signal S4.
[0011] The on-chip millimeter-wave radar multi-mode local oscillator link is implemented using semiconductor integrated circuit technology.
[0012] According to the second aspect of the present invention, a multi-mode local oscillator link control method for an on-chip millimeter-wave radar is also provided, which includes four operating modes: a normal operating mode, a local oscillator reference signal test mode, a local oscillator link test mode, and an array radar cascade mode.
[0013] The normal operating mode includes the following steps: setting the control signals D1 and D2 in the distribution network to high, disconnecting the secondary coil network from the voltages V1 and V2, turning off the first and second amplifier circuits through control signals S1 and S2, turning on the third amplifier circuit through control signal S3, and selecting the two-selection circuit to the output path of the third amplifier circuit through control signal S4. The local oscillator reference signal is input through the LO_INP and LO_INN differential ports, and is output through the LO_OUTP and LO_OUTN differential ports after amplification, frequency multiplication, and driving.
[0014] The local oscillator reference signal test mode includes the following steps: setting the control signal D1 in the distribution network to low and D2 to high, connecting the secondary coil network to the voltage V1, turning off the first amplifier circuit via the control signal S1, and turning on the second and third amplifier circuits via the control signals S2 and S3; and inputting the local oscillator reference signal via the LO_INP and LO_INN differential ports, and outputting it via the LO_IO port after amplification and driving.
[0015] The local oscillator link test mode includes the following steps: setting control signal D1 in the distribution network high and D2 low, connecting the secondary coil network to voltage V2, turning on the first amplifier circuit via control signal S1, and turning off the second and third amplifier circuits via control signals S2 and S3; and inputting a local oscillator test signal via the LO_IO port, amplifying, frequency multiplying, and driving the signal and outputting it via the LO_OUTP and LO_OUTN differential ports.
[0016] The array radar cascade mode is further divided into a master unit mode and a slave unit mode; the master unit mode includes the following steps: setting the control signal D1 in the distribution network to low and D2 to high, connecting the secondary coil network to the voltage V1, turning off the first amplifier circuit through the control signal S1, turning on the second amplifier circuit and the third amplifier circuit through the control signals S2 and S3, inputting the local oscillator reference signal through the LO_INP and LO_INN differential ports, and outputting the local oscillator reference signal through the LO_IO port after amplification and driving; the slave unit mode includes the following steps: setting the control signal D1 in the distribution network to high and D2 to low, connecting the secondary coil network to the voltage V2, turning on the first amplifier circuit through the control signal S1, turning off the second amplifier circuit and the third amplifier circuit through the control signals S2 and S3, inputting the local oscillator reference signal through the LO_IO port, and outputting the local oscillator reference signal through the LO_OUTP and LO_OUTN differential ports after amplification, frequency multiplication, and driving.
[0017] The benefits of the present invention lie in that, in combination with the requirements of multiple operating modes of on-chip millimeter-wave radar, a highly integrated distribution network and a series of control switches are adopted to optimize the design of the millimeter-wave radar local oscillator link, thereby compressing the chip area and reducing the chip cost while ensuring the multi-mode hardware compatibility of the millimeter-wave radar. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0019] Figure 1 This is a schematic diagram of the multi-mode local oscillator link structure of the on-chip millimeter-wave radar of the present invention;
[0020] Figure 2 A schematic diagram of a distribution network of the present invention;
[0021] Figure 3 A schematic diagram of a metal layer used in a multi-port transformer B1 according to an embodiment of the present invention;
[0022] Figure 4 This is the layout of the multi-port transformer B1 according to an embodiment of the present invention;
[0023] Figure 5 This is a layout diagram of the coil L1 in the multi-port transformer B1 according to an embodiment of the present invention;
[0024] Figure 6 Schematic diagram of coils L2 and L3 in the multi-port transformer B1 according to an embodiment of the present invention. DETAILED DESCRIPTION
[0025] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and examples. However, it should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessary confusion of the concepts of the present invention.
[0026] like Figure 1 As shown, an embodiment of the present invention provides an on-chip millimeter-wave radar multi-mode local oscillator link, including a distribution network 101, a first amplifier circuit 102, a second amplifier circuit 103, a third amplifier circuit 104, a two-choose-one circuit 105, a frequency multiplication circuit 106, and a fourth amplifier circuit 107. The distribution network 101 is connected to the input of the first amplifier circuit 102 and the output of the second amplifier circuit 103. The output of the first amplifier circuit 102 is connected to one input of the two-choose-one circuit 105. The other input of the two-choose-one circuit 105 is connected to the output of the third amplifier circuit 104 and the input of the second amplifier circuit 103. The output of the two-choose-one circuit 105 is connected to the input of the frequency multiplication circuit 106. The output of the frequency multiplication circuit 106 is connected to the input of the fourth amplifier circuit 107. The first amplifier circuit 102 is connected to the control signal S1, the second amplifier circuit 103 is connected to the control signal S2, the third amplifier circuit 104 is connected to the control signal S3, and the two-choose-one circuit 105 is connected to the control signal S4.
[0027] like Figure 2 As shown, the distribution network 101 includes a multi-port transformer B1, an N-type MOS transistor M1, an N-type MOS transistor M3, an N-type MOS transistor M5, an N-type MOS transistor M7, a P-type MOS transistor M2, a P-type MOS transistor M4, a P-type MOS transistor M6, a P-type MOS transistor M8, an inverter I1, an inverter I2, a capacitor C1, and a capacitor C2; Figure 4As shown, the multi-port transformer B1 includes a primary coil L1, a first secondary coil L2 and a second secondary coil L3; the two ends of the coil L1 are connected to port a and ground respectively, the two ends of the coil L2 are connected to port b and port e respectively, and the two ends of the coil L3 are connected to port d and port c respectively; the source and drain ends of the N-type MOS transistor M1 and the P-type MOS transistor M2 are connected in parallel to port b and voltage V1 respectively, the source and drain ends of the N-type MOS transistor M3 and the P-type MOS transistor M4 are connected in parallel to port c and voltage V1 respectively, the P-type MOS transistor M2 and the P-type MOS transistor M4 are connected to the input end of the inverter I1 and the control signal D1, and the N-type MOS transistor M1 is connected to the input end of the inverter I1 and the control signal D1. The S-transistor M1 and the N-type MOS transistor M3 are connected to the output end of the inverter I1; the source and drain ends of the N-type MOS transistor M5 and the P-type MOS transistor M6 are connected in parallel to the port e and the voltage V2 respectively; the source and drain ends of the N-type MOS transistor M7 and the P-type MOS transistor M8 are connected in parallel to the port d and the voltage V2 respectively; the P-type MOS transistor M6 and the P-type MOS transistor M8 are connected to the input end of the inverter I2 and the control signal D2; the N-type MOS transistor M5 and the N-type MOS transistor M7 are connected to the output end of the inverter I2; the two ends of the capacitor C1 are connected to the voltage V1 and the ground respectively; the two ends of the capacitor C2 are connected to the voltage V2 and the ground respectively.
[0028] The voltage V1 provides a power supply voltage for the second amplifier circuit 103 , and the voltage V2 provides a bias voltage for the first amplifier circuit 102 .
[0029] like Figure 5 As shown, the coil L1 uses metal layers M3 and M4, adopts a regular octagonal symmetrical interwinding form, and the ports are gathered on one side; Figure 6 As shown, coils L2 and L3 use metal layers M1 and M2, and are inter-wound in a regular octagonal cross-symmetric manner with the same number of turns. The same-name ends of coil L2 and the non-same-name ends of coil L3 are gathered at the side of the gathered port of coil L1 rotated 90° clockwise, and the non-same-name ends of coil L2 and the same-name ends of coil L3 are gathered at the side of the gathered port of coil L1 rotated 90° counterclockwise.
[0030] The inputs and outputs of the first amplifier circuit 102 , the second amplifier circuit 103 , the third amplifier circuit 104 , the amplifier circuit 4107 and the two-to-one circuit 105 are all differential signals.
[0031] The first amplifier circuit 102 , the second amplifier circuit 103 , and the third amplifier circuit 104 respectively implement a shutdown function through control signals S1 , S2 , and S3 .
[0032] The two-choose-one circuit 105 implements a two-choose-one switching function through the control signal S4.
[0033] This embodiment is implemented using semiconductor integrated circuit technology.
[0034] As a specific solution, in this embodiment, the on-chip millimeter-wave radar multi-mode local oscillator link is compatible with four operating modes: normal operating mode, local oscillator reference signal test mode, local oscillator link test mode and array radar cascade mode.
[0035] The normal working mode includes the following steps: setting the control signals D1 and D2 in the distribution network 101 to high, disconnecting the secondary coil network from the voltages V1 and V2, turning off the first amplifier circuit 102 and the second amplifier circuit 103 through the control signals S1 and S2, turning on the third amplifier circuit 104 through the control signal S3, and selecting the output path of the third amplifier circuit 104 through the control signal S4 from the two-selection circuit 105. The local oscillator reference signal is sent into the local oscillator chain through the LO_INP and LO_INN differential ports, and is output from the LO_OUTP and LO_OUTN differential ports after amplification, frequency multiplication, and driving.
[0036] The local oscillator reference signal test mode includes the following steps: setting the control signal D1 in the distribution network 101 to low and D2 to high, connecting the secondary coil network to the voltage V1, turning off the first amplifier circuit 102 through the control signal S1, and turning on the second amplifier circuit 103 and the third amplifier circuit 104 through the control signals S2 and S3. The local oscillator reference signal is sent into the local oscillator link through the LO_INP and LO_INN differential ports, and is output from the LO_IO port after amplification and driving.
[0037] The local oscillator link test mode includes the following steps: setting the control signal D1 in the distribution network 101 high and D2 low, connecting the secondary coil network to the voltage V2, turning on the first amplifier circuit 102 via the control signal S1, and turning off the second amplifier circuit 103 and the third amplifier circuit 104 via the control signals S2 and S3, and sending the local oscillator test signal into the local oscillator link from the LO_IO port, and after amplification, frequency multiplication, and driving, output from the LO_OUTP and LO_OUTN differential ports.
[0038] In the array radar cascade mode, there are two modes: master unit mode and slave unit mode. The master unit mode includes the following steps: setting control signals D1 and D2 in the distribution network 101 low and high, connecting the secondary coil network to voltage V1, turning off the first amplifier circuit 102 via control signal S1, turning on the second and third amplifier circuits 103 and 104 via control signals S2 and S3, and sending the local oscillator reference signal from the LO_INP and LO_INN differential ports to the local oscillator chain. After amplification and driving, the local oscillator reference signal is output from the LO_IO port. The slave unit mode includes the following steps: setting control signals D1 and D2 in the distribution network 101 high and low, connecting the secondary coil network to voltage V2, turning on the first amplifier circuit 102 via control signal S1, turning off the second and third amplifier circuits 103 and 104 via control signals S2 and S3, and sending the local oscillator reference signal from the LO_IO port to the local oscillator chain. After amplification, frequency multiplication, and driving, the local oscillator reference signal is output from the LO_OUTP and LO_OUTN differential ports.
[0039] Traditional distribution networks are generally implemented using three transformers. For a 15GHz local oscillator link, the layout area is approximately 280um*400um. The distribution network in this embodiment has a layout area of approximately 160um*160um, which is only 23% of the traditional design.
[0040] The present invention combines the multiple operating modes of on-chip millimeter-wave radar and optimizes the design of the millimeter-wave radar local oscillator link by adopting a highly integrated distribution network and a series of control switches. While ensuring the compatibility of the millimeter-wave radar's multi-mode hardware, it also compresses the chip area and reduces the chip cost.
[0041] The above description of the embodiments of the present invention is intended to enable one skilled in the art to implement or use the present invention. Modifications to the embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to be applied in the widest manner consistent with the principles and novel features disclosed herein.
Claims
1. An on-chip millimeter-wave radar multi-mode local oscillator link, characterized in that: include: a distribution network, a first amplifier circuit, a second amplifier circuit, a third amplifier circuit, a two-choose-one circuit, a frequency multiplier circuit, and a fourth amplifier circuit; the distribution network is respectively connected to the input of the first amplifier circuit and the output of the second amplifier circuit, the output of the first amplifier circuit is connected to one input of the two-choose-one circuit, the other input of the two-choose-one circuit is connected to the output of the third amplifier circuit and the input of the second amplifier circuit, the output of the two-choose-one circuit is connected to the input of the frequency multiplier circuit, and the output of the frequency multiplier circuit is connected to the input of the fourth amplifier circuit; the first amplifier circuit is connected to a control signal S1, the second amplifier circuit is connected to a control signal S2, the third amplifier circuit is connected to a control signal S3, and the two-choose-one circuit is connected to a control signal S4; The distribution network includes: a multi-port transformer B1, an N-type MOS transistor M1, an N-type MOS transistor M3, an N-type MOS transistor M5, an N-type MOS transistor M7, a P-type MOS transistor M2, a P-type MOS transistor M4, a P-type MOS transistor M6, a P-type MOS transistor M8, an inverter I1, an inverter I2, a capacitor C1, and a capacitor C2; the multi-port transformer B1 includes a primary coil L1, a first secondary coil L2, and a second secondary coil L3; the two ends of the coil L1 are respectively connected to port a and ground, the two ends of the coil L2 are respectively connected to port b and port e, and the two ends of the coil L3 are respectively connected to port d and port c; the source and drain ends of the N-type MOS transistor M1 and the P-type MOS transistor M2 are respectively connected in parallel to port b and voltage V1, and the source and drain ends of the N-type MOS transistor M3 and the P-type MOS transistor M4 are respectively connected in parallel to port b and voltage V1. The PMOS transistor M2 and the PMOS transistor M4 are connected to the input terminal of the inverter I1 and the control signal D1, and the NMOS transistor M1 and the NMOS transistor M3 are connected to the output terminal of the inverter I1; the source and drain terminals of the NMOS transistor M5 and the PMOS transistor M6 are connected in parallel to the port e and the voltage V2, respectively; the source and drain terminals of the NMOS transistor M7 and the PMOS transistor M8 are connected in parallel to the port d and the voltage V2, respectively; the PMOS transistor M6 and the PMOS transistor M8 are connected to the input terminal of the inverter I2 and the control signal D2, and the NMOS transistor M5 and the NMOS transistor M7 are connected to the output terminal of the inverter I2; the two terminals of the capacitor C1 are connected to the voltage V1 and ground, respectively, and the two terminals of the capacitor C2 are connected to the voltage V2 and ground, respectively. The first amplifying circuit, the second amplifying circuit and the third amplifying circuit respectively realize a shut-down function through control signals S1, S2 and S3; the two-choose-one circuit realizes a two-choose-one switching function through control signal S4.
2. The on-chip millimeter-wave radar multi-mode local oscillator link according to claim 1, characterized in that: The voltage V1 provides a power supply voltage for the second amplifier circuit, and the voltage V2 provides a bias voltage for the first amplifier circuit.
3. The on-chip millimeter-wave radar multi-mode local oscillator link according to claim 1, characterized in that: The coil L1 is symmetrically wound, with its ports gathered on one side; the coils L2 and L3 are cross-symmetrically wound, with the same number of turns; the like-named ends of the coil L2 and the non-like-named ends of the coil L3 are gathered on the side of the gathered port of the coil L1 rotated 90° clockwise, and the non-like-named ends of the coil L2 and the like-named ends of the coil L3 are gathered on the side of the gathered port of the coil L1 rotated 90° counterclockwise.
4. The on-chip millimeter-wave radar multi-mode local oscillator link according to claim 1, characterized in that: Inputs and outputs of the first amplifying circuit, the second amplifying circuit, the third amplifying circuit, the fourth amplifying circuit and the two-to-one circuit are all differential signals.
5. The on-chip millimeter-wave radar multi-mode local oscillator link according to claim 1, characterized in that: It is realized using semiconductor integrated circuit technology.
6. A method for controlling an on-chip millimeter-wave radar multi-mode local oscillator link of an on-chip millimeter-wave radar multi-mode local oscillator link according to any one of claims 1 to 5, characterized in that: The control method includes: a normal working mode, a local oscillator reference signal test mode, a local oscillator link test mode and an array radar cascade mode; The normal operating mode includes the following steps: setting control signals D1 and D2 in the distribution network to high, disconnecting the multi-port transformer B1 from voltages V1 and V2, turning off the first and second amplifier circuits via control signals S1 and S2, turning on the third amplifier circuit via control signal S3, and selecting the two-selection circuit to the output path of the third amplifier circuit via control signal S4. The local oscillator reference signal is input from the LO_INP and LO_INN differential ports of the third amplifier circuit, and is output from the LO_OUTP and LO_OUTN differential ports of the fourth amplifier circuit after amplification, frequency multiplication, and driving. The local oscillator reference signal test mode includes the following steps: setting the control signal D1 in the distribution network to low and D2 to high, connecting the multi-port transformer B1 to the voltage V1, turning off the first amplifier circuit through the control signal S1, and turning on the second amplifier circuit and the third amplifier circuit through the control signals S2 and S3, and inputting the local oscillator reference signal through the LO_INP and LO_INN differential ports of the third amplifier circuit, and outputting it through the LO_IO port of the distribution network after amplification and driving; The local oscillator link test mode includes the following steps: setting the control signal D1 in the distribution network to high and D2 to low, connecting the multi-port transformer B1 to the voltage V2, turning on the first amplifier circuit via the control signal S1, and turning off the second amplifier circuit and the third amplifier circuit via the control signals S2 and S3, and inputting a local oscillator test signal from the LO_IO port of the distribution network, amplifying, frequency multiplying, and driving, and outputting the local oscillator test signal from the LO_OUTP and LO_OUTN differential ports of the fourth amplifier circuit. The array radar cascade mode is divided into a master unit mode and a slave unit mode; the master unit mode includes the following steps: setting the control signal D1 in the distribution network to low and D2 to high, connecting the multi-port transformer B1 to the voltage V1, turning off the first amplifier circuit through the control signal S1, turning on the second amplifier circuit and the third amplifier circuit through the control signals S2 and S3, and inputting the local oscillator reference signal through the LO_INP and LO_INN differential ports of the third amplifier circuit, and outputting it from the LO_IO port of the distribution network after amplification and driving; the slave unit mode includes the following steps: setting the control signal D1 in the distribution network to high and D2 to low, connecting the multi-port transformer B1 to the voltage V2, turning on the first amplifier circuit through the control signal S1, turning off the second amplifier circuit and the third amplifier circuit through the control signals S2 and S3, and inputting the local oscillator reference signal through the LO_IO port of the distribution network, and outputting it from the LO_OUTP and LO_OUTN differential ports of the fourth amplifier circuit after amplification, frequency multiplication, and driving.
Citation Information
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