Transmitter, transmitter, transmission method, and program

Abstract

To provide a transmission device capable of handling a transmission signal, free from power restrictions imposed by an element such as a PIN diode that limits the transmission signal to a predetermined power or less.SOLUTION: A transmission device includes an amplifier that amplifies a transmission signal generated in response to a command signal without passing through a first element that limits the transmission signal to a predetermined power or less, and an output device that transmits the signal amplified by the amplifier.SELECTED DRAWING: Figure 9

Description

Technical Field

[0001] The present disclosure relates to a transmission device, a transmitter, a transmission method, and a program.

Background Art

[0002] Communication technologies are used in various fields. In a transmitter that performs communication, it is required to transmit a signal with a predetermined power. As a related technology, Patent Document 1 discloses a technology related to a transmitter capable of adjusting the transmission level of an antenna.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in a transmitter, a variable attenuator having a PIN diode may be used. A PIN diode generally has a smaller inputable power compared to other elements in a transmitter. Therefore, in a transmitter using a PIN diode, the inputable power is limited. Therefore, there is a need for a technology that can handle a transmission signal without being restricted by the power of an element that limits the transmission signal to a predetermined power or less, such as a PIN diode.

[0005] Each aspect of the present disclosure aims to provide a transmission device, a transmitter, a transmission method, and a program capable of solving the above problems.

Means for Solving the Problems

[0006] To achieve the above object, according to one aspect of the present disclosure, a transmission device includes An amplifier that amplifies a transmission signal generated in response to a command signal without passing through a first element that limits the transmission signal to a predetermined power or less, comprising: an amplifier having a plurality of resistors for determining the voltage gain of the amplifier; a control device that changes the connection of the plurality of resistors based on the state of each of a plurality of switches connected to at least one of the plurality of resistors and the total resistance value of the plurality of resistors; and an output device that transmits the signal amplified by the amplifier. .

[0007] To achieve the above objective, according to another aspect of this disclosure, the transmitter comprises a transmitting device and a generating device that outputs a transmission signal to the transmitting device.

[0008] To achieve the above objective, according to another aspect of this disclosure, the transmission method is: A processing method performed by a transmitting device comprising an amplifier having a plurality of resistors for determining the voltage gain of the self-amplifier, a control device, and an output device, the method comprising: the amplifier amplifying a transmission signal generated in response to a command signal without a first element that limits the transmission signal to a predetermined power or less; the control device changing the connections of the plurality of resistors based on the state of each of a plurality of switches connected to at least one of the plurality of resistors and the total resistance value of the plurality of resistors; and the output device transmitting the amplified signal. .

[0009] To achieve the above objectives, according to another aspect of this disclosure, the program is: An amplifier that amplifies a transmission signal generated in response to a command signal without passing through a first element that limits the transmission signal to a predetermined power or less, wherein the amplifier has a plurality of resistors for determining the voltage gain of the amplifier, and the computer of the transmitting device is made to perform the following actions based on the state of each of a plurality of switches connected to at least one of the plurality of resistors and the total resistance value of the plurality of resistors: change the connection of the plurality of resistors and transmit the amplified signal. . [Effects of the Invention]

[0010] According to each aspect of this disclosure, it is possible to handle a transmitted signal that is not subject to power constraints imposed by an element that limits the transmitted signal to a predetermined power level or lower. [Brief explanation of the drawing]

[0011] [Figure 1] This figure shows an example of the configuration of a transmitter according to the first embodiment of this disclosure. [Figure 2] This figure shows an example of the configuration of a power amplifier according to the first embodiment of this disclosure. [Figure 3] This figure shows an example of a data table stored in a storage device according to the first embodiment of this disclosure. [Figure 4] This figure shows an example of the processing flow of a transmitter according to the first embodiment of this disclosure. [Figure 5] This diagram shows an example of the configuration of a transmitter to be compared. [Figure 6] This figure shows an example of the configuration of a transmitter according to a second embodiment of this disclosure. [Figure 7] This figure shows an example of a data table stored in a storage device according to a second embodiment of this disclosure. [Figure 8] This figure shows an example of the processing flow of a transmitter according to a second embodiment of the present disclosure. [Figure 9] This figure shows the minimum configuration of a transmitting device according to an embodiment of the present disclosure. [Figure 10]A diagram showing an example of the processing flow of a transmission device with a minimum configuration according to an embodiment of the present disclosure. [Figure 11] A schematic block diagram showing the configuration of a computer according to at least one embodiment.

Mode for Carrying Out the Invention

[0012] Hereinafter, embodiments will be described in detail with reference to the drawings. <First Embodiment> FIG. 1 is a diagram showing an example of the configuration of a transmitter 1 according to the first embodiment of the present disclosure. As shown in FIG. 1, the transmitter 1 includes an input device 10, a signal generation device 20, and a transmission device 30. The transmitter 1 is a transmitter that corrects the amplitude of a transmission signal that changes with a change in temperature inside the transmitter 1 to a transmission signal with a predetermined amplitude by the transmission device 30.

[0013] The input device 10 generates a command signal based on a user's operation. Examples of the input device 10 include a touch panel, a microphone, a keyboard, etc. When the user performs an operation to transmit certain information from the transmitter 1 to the input device 10, the input device 10 generates a command signal corresponding to the operation performed by the user. Examples of the information transmitted from the transmitter 1 include information such as voice, image, file, etc. The input device 10 outputs the command signal to the signal generation device 20 and the transmission device 30.

[0014] The signal generation device 20 generates a transmission signal based on the command signal output by the input device 10. Examples of the transmission signal include a transmission signal for transmitting information such as voice, image, file, etc., and a transmission signal subjected to modulation such as phase shift keying (PSK) or quadrature amplitude modulation (QAM). The signal generation device 20 outputs the transmission signal to the transmission device 30.

[0015] The transmission device 30 is a device that corrects the transmission signal transmitted by the transmitter 1 to a transmission signal with a predetermined amplitude (predetermined power, that is, a predetermined radio wave intensity) even when the temperature in the transmitter 1 changes. As shown in FIG. 1, the transmission device 30 includes a power amplifier 301 (an example of an amplifier), a power detector 302 (an example of an output device), a detector 303 (an example of a detection device), an AD (Analog to Digital) converter 304, a control device 305, and a storage device 306.

[0016] The power amplifier 301 amplifies the amplitude of the input signal to the amplitude of a signal multiplied by the voltage gain Gv of the power amplifier 301 determined based on the control by the control device 305. The power amplifier 301 outputs the amplified signal to the power detector 302.

[0017] FIG. 2 is a diagram showing an example of the configuration of the power amplifier 301 according to the first embodiment of the present disclosure. For example, as shown in FIG. 2, the power amplifier 301 includes a transistor 3011, capacitors 3012 and 3013, resistors 3014, 3015a1, 3015a2, ···, 3015a(n - 1), 3015an, and switches 3016a1, 3016a2, ···, 3016a(n - 1), 3016an. The resistors 3015a1, 3015a2, ···, 3015a(n - 1), 3015an are collectively referred to as resistor 3015a. The switches 3016a1, 3016a2, ···, 3016a(n - 1), 3016an are collectively referred to as switch 3016a.

[0018] The transistor 3011 is composed of a semiconductor such as silicon and amplifies the signal. Examples of the transistor 3011 include a MOSFET (Metal Oxcide Semiconductor Field Effect Transistor) and a bipolar transistor.

[0019] Capacitor 3012 removes the DC component from the signal input to power amplifier 301. Capacitor 3013 removes the DC component from the signal output from transistor 3011. Resistor 3014 supplies an external bias voltage Vg to the first terminal of transistor 3011 and also allows the signal (AC component) input from capacitor 3012 to the first terminal of transistor 3011 to be superimposed on that bias voltage Vg.

[0020] Each of the resistors 3015a is connected in series. The total resistance across the entire series of resistors 3015a changes depending on whether each of the switches 3016a is on or off, as will be described later. The resistors 3015a, along with the transconductance gm of transistor 3011, determine the voltage gain Gv of the power amplifier 301. For example, if the total resistance across the entire series of resistors 3015a is Rd, the voltage gain Gv of the power amplifier 301 is gm·Rd, which is the product of the transconductance gm and the resistance value Rd.

[0021] Each of the switches 3016a can be turned on or off under the control of the control device 305. Each of the switches 3016a is, for example, a transistor switch made of a MOSFET. By each of the switches 3016a being turned on or off under the control of the control device 305, the total resistance value of the series-connected resistors 3015a is adjusted to a desired resistance value. For example, as shown in Figure 2, switch 3016a1 is connected in parallel to resistor 3015a1, switch 3016a2 is connected in parallel to resistor 3015a2, switch 3016a(n-1) is connected to resistor 3015a(n-1), and switch 3016an is connected in parallel to resistor 3015an. When any of the switches 3016a are turned on, the ends of one resistor 3015a connected in parallel to that switched 3016a are short-circuited. In other words, when switch 3016a1 is ON, the resistance between the ends of resistor 3015a1 becomes zero; when switch 3016a2 is ON, the resistance between the ends of resistor 3015a2 becomes zero; when switch 3016a(n-1) is ON, the resistance between the ends of resistor 3015a(n-1) becomes zero; and when switch 3016an is ON, the resistance between the ends of resistor 3015a1 becomes zero. In this way, by short-circuiting any two ends of resistor 3015a with switch 3016a, the total resistance of the series-connected resistors 3015a changes. Therefore, by controlling each of the switches 3016a to the desired ON or OFF state, the control device 305 makes the total resistance of the series-connected resistors 3015a a desired resistance.

[0022] In the power amplifier 301 shown in Figure 2, the first terminal of transistor 3011 is connected to the first terminal of capacitor 3012 and the first terminal of resistor 3014. The second terminal of transistor 3011 is connected to the first terminal of capacitor 3013, the first terminal of resistor 3015a1, and the first terminal of switch 3016a1. The second terminal of resistor 3015a1 is connected to the first terminal of resistor 3015a2, the second terminal of switch 3016a1, and the first terminal of switch 3016a2. The second terminal of resistor 3015a2 is connected to the first terminal of resistor 3015a3, the second terminal of switch 3016a2, and the first terminal of switch 3016a3. Similarly, the second terminal of resistor 3015a(n-2) is connected to the first terminal of resistor 3015a(n-1), the second terminal of switch 3016a(n-2), and the first terminal of switch 3016a(n-1). The second terminal of resistor 3015a(n-1) is connected to the first terminal of resistor 3015an, the second terminal of switch 3016a(n-1), and the first terminal of switch 3016an. The second terminal of resistor 3015an is then connected to the second terminal of switch 3016an.

[0023] The power amplifier 301 has terminals GND, Vin, Vout, Vg, and Vdd. Terminal GND is the ground terminal which serves as the reference voltage for the power amplifier 301. Terminal Vin is the terminal to which the transmission signal transmitted by transmitter 1 is input to the power amplifier 301. Terminal Vout is the terminal to which the transmission signal transmitted by transmitter 1 is output from the power amplifier 301. Terminal Vg is the terminal to which an external bias voltage Vg is supplied to transistor 3011. Terminal Vdd is the terminal to which a voltage Vdd is supplied to resistor 3015a for applying a voltage to the drain from an external source.

[0024] The third terminal of transistor 3011 is terminal GND. The second terminal of capacitor 3012 is terminal Vin. The second terminal of capacitor 3013 is terminal Vout. The second terminal of resistor 3014 is terminal Vg. The second terminal of resistor 3015an is terminal Vdd.

[0025] The power detector 302 extracts a portion of the power output by the power amplifier 301. For example, the power detector 302 has a transformer, and the signal output by the power amplifier 301 is input to the primary coil of the transformer. From the secondary coil of the transformer, a signal corresponding to the signal output by the power amplifier 301 is extracted as part of the power output by the power amplifier 301. The power detector 302 outputs a portion of the extracted power (i.e., a signal corresponding to the signal output by the power amplifier 301) to the detector 303. The power detector 302 may also use a microstrip line type directional coupler.

[0026] The detector 303 detects the envelope of the signal output by the power detector 302. The detector 303 outputs an analog signal indicating the detected envelope to the AD converter 304. The detection of the signal envelope by the detector 303 may use existing technology. An example of existing technology is a technique that detects the signal envelope by using a diode to allow current to flow only in the forward direction and cutting high-frequency components using an LPF composed of a resistor and a capacitor.

[0027] The AD converter 304 converts the analog signal representing the envelope detected by the detector 303 into a digital signal. This digital signal corresponds one-to-one with the amplitude of the transmission signal that is actually transmitted. The AD converter 304 outputs the converted digital signal to the control device 305.

[0028] The control device 305 generates a control signal to control the voltage gain Gv of the power amplifier 301 based on the command signal output by the input device 10 and the digital signal output by the AD converter 304. The control device 305 can determine the target amplitude of the transmission signal that the transmitter 1 should transmit based on the command signal output by the input device 10. Furthermore, since the digital signal is a signal that corresponds one-to-one with the amplitude of the transmission signal to be actually transmitted, the control device 305 can determine the amplitude of the transmission signal to be actually transmitted from the digital signal. Therefore, for example, the control device 305 determines the target amplitude of the transmission signal from the command signal output by the input device 10. The control device 305 also determines the actual amplitude of the transmission signal from the digital signal. Then, the control device 305 divides the value of the target amplitude of the transmission signal by the value of the actual amplitude of the transmission signal. The control device 305 only needs to generate a control signal to adjust the voltage gain of the power amplifier 301 so that the voltage gain Gv of the power amplifier 301 when the division result is obtained becomes the voltage gain obtained by multiplying the voltage gain of the power amplifier 301 by the division result.

[0029] Specifically, if the total resistance across the entire resistor 3015a is Rd, and the result of dividing the target transmission signal amplitude by the actual transmission signal amplitude is k, then the control device 305 should control the state of each switch 3016a (i.e., on or off) so that the resistance value becomes (Rd·k). For example, the control device 305 identifies the total resistance value across the entire resistor 3015a that is (Rd·k) in the data table TBL1, which shows the relationship between the state of each switch 3016a stored in the memory device 306 (described later) and the total resistance value across the entire resistor 3015a, and the control signal is the signal that sets the state of each switch 3016a associated with the identified resistance value. The control device 305 should then use this control signal to control each switch 3016a (i.e., control the voltage gain of the power amplifier 301).

[0030] The storage device 306 stores various information necessary for the processing performed by the transmitting device 30. For example, the storage device 306 stores a data table TBL1 that the control device 305 uses to change the resistance value across the entire resistor 3015a. Figure 3 shows an example of a data table TBL1 stored in the storage device 306 according to the first embodiment of this disclosure. As shown in Figure 3, the data table TBL1 is a data table that associates the state of each switch 3016a with the resistance value across the entire resistor 3015a. When the resistance value (Rd·k) after changing the voltage gain of the power amplifier 301 is determined from this data table TBL1, it is possible to determine what state each switch 3016a should be in (i.e., whether it should be in the ON state or the OFF state).

[0031] Next, the processing performed by transmitter 1 will be described. Figure 4 is a diagram showing an example of the processing flow of transmitter 1 according to the first embodiment of this disclosure. The voltage gain of power amplifier 301 is set to Gv times.

[0032] The input device 10 generates a command signal based on user operation. The input device 10 outputs the command signal to the signal generator 20 and the transmitter 30.

[0033] The signal generator 20 generates a transmission signal based on the command signal output by the input device 10. The signal generator 20 outputs the transmission signal to the transmission device 30.

[0034] The transmitting device 30 is a device that corrects the transmission signal transmitted by the transmitter 1 to a transmission signal of a predetermined amplitude (a predetermined power, i.e., a predetermined radio wave intensity) even when the temperature inside the transmitter 1 changes. As shown in Figure 1, the transmitting device 30 includes a power amplifier 301, a power detector 302, a detector 303, an AD (Analog to Digital) converter 304, a control device 305, and a storage device 306.

[0035] The power amplifier 301 amplifies the amplitude of the input signal to the amplitude of the signal multiplied by the voltage gain Gv of the power amplifier 301, which is determined based on the control by the control device 305 (step S1). The power amplifier 301 outputs the amplified signal to the power detector 302.

[0036] The power detector 302 extracts a portion of the power output by the power amplifier 301 (step S2). The power detector 302 outputs a portion of the extracted power (i.e., a signal corresponding to the signal output by the power amplifier 301) to the detector 303.

[0037] The detector 303 detects the envelope of the signal output by the power detector 302 (step S3). The detector 303 outputs an analog signal indicating the detected envelope to the AD converter 304.

[0038] The AD converter 304 converts the analog signal representing the envelope detected by the detector 303 into a digital signal (step S4). The AD converter 304 outputs the converted digital signal to the control device 305.

[0039] The control device 305 generates a control signal to control (in this case, change) the voltage gain Gv of the power amplifier 301 based on the command signal output by the input device 10 and the digital signal output by the AD converter 304 (step S5). For example, the control device 305 identifies the amplitude of the target transmission signal from the command signal output by the input device 10. The control device 305 also identifies the amplitude of the actual transmission signal from the digital signal. Then, the control device 305 divides the value of the target transmission signal amplitude by the value of the actual transmission signal amplitude. The control device 305 generates a control signal to adjust the voltage gain of the power amplifier 301 so that the voltage gain Gv of the power amplifier 301 when the division result is obtained becomes the voltage gain obtained by multiplying the voltage gain Gv of the power amplifier 301 by the division result.

[0040] Specifically, if the total resistance across the entire resistor 3015a is Rd, and the result of dividing the target transmission signal amplitude by the actual transmission signal amplitude is k, the control device 305 controls the state of each switch 3016a (i.e., on or off) so that the resistance value becomes (Rd·k). For example, in the data table TBL1, which shows the relationship between the state of each switch 3016a stored in the memory device 306 and the total resistance across the entire resistor 3015a, the control device 305 identifies the total resistance value across the entire resistor 3015a that has a resistance value of (Rd·k), and the signal that sets the state of each switch 3016a associated with the identified resistance value is the control signal. The control device 305 uses the control signal to control each switch 3016a (i.e., to control the voltage gain of the power amplifier 301) (step S6).

[0041] The transmitter 1 according to the first embodiment of this disclosure has been described above. Now, the comparative transmitter 1a will be described. Figure 5 is a diagram showing an example of the configuration of the comparative transmitter 1a. As shown in Figure 5, the transmitter 1a comprises an input device 10, a signal generating device 20, and a transmitting device 50.

[0042] As shown in Figure 5, the transmitting device 50 includes a variable attenuator 501, a power amplifier 502, a power detector 503, a detector 504, an AD converter 505, a control device 506, a DA converter 507, and a level converter 508. The variable attenuator 501 includes a PIN diode 501a (an example of a first element). The PIN 502a limits the transmitted signal generated in response to the command signal to a predetermined power level or lower. Thus, in the transmitting device 50 using the PIN diode 501a, the power of the transmitted signal handled by the transmitter 1a is also limited by the power limitations that the PIN diode 501a can handle.

[0043] Furthermore, since the transmitter 1 according to the first embodiment of this disclosure does not use a PIN diode, there are no restrictions on the transmitted signal like those in transmitter 1a. In transmitter 1, the power amplifier 301 (an example of an amplifier) ​​amplifies the transmitted signal generated in response to the command signal without passing through a first element that limits the transmitted signal to a predetermined power or less. The power detector 302 (an example of an output device) transmits the signal after it has been amplified by the power amplifier 301. Therefore, transmitter 1 can handle a transmitted signal that is not subject to power restrictions by an element that limits the transmitted signal to a predetermined power or less, such as a PIN diode.

[0044] <Second Embodiment> Next, a transmitter 1 according to a second embodiment of this disclosure will be described. Figure 6 is a diagram showing an example of the configuration of the transmitter 1 according to a second embodiment of this disclosure. As shown in Figure 6, the transmitter 1 according to the second embodiment includes an input device 10, a signal generating device 20, and a transmitting device 30, similar to the transmitter 1 according to the first embodiment shown in Figure 1. Furthermore, as shown in Figure 6, the transmitter 1 according to the second embodiment also includes a temperature detection device 40. Here, the main differences between the transmitter 1 according to the second embodiment and the transmitter 1 according to the first embodiment will be described.

[0045] The input device 10 generates a command signal based on user operation. The input device 10 outputs the command signal to the signal generator 20. In other words, the input device 10 according to the second embodiment does not output the command signal to the transmitter 30.

[0046] The temperature detection device 40 detects the internal temperature of the transmitter 1. The temperature detection device 40 outputs information indicating the detected temperature to the transmitter 30.

[0047] The transmitting device 30 is a device that corrects the transmission signal transmitted by the transmitter 1 to a transmission signal of a predetermined amplitude (a predetermined power, i.e., a predetermined radio wave intensity) even when the temperature inside the transmitter 1 changes. The transmitting device 30, like the transmitting device 30 according to the first embodiment shown in Figure 1, includes a power amplifier 301, a power detector 302, a detector 303, an AD converter 304, a control device 305, and a storage device 306. The main difference between the transmitting device 30 according to the second embodiment and the transmitting device 30 according to the first embodiment is the control device 305 and the storage device 306.

[0048] The storage device 306 stores various information necessary for the processing performed by the transmitting device 30. For example, while the temperature detection device 40 detects the temperature inside the transmitter 1, the processing performed by the transmitter 1 according to the first embodiment is executed. In this processing, the storage device 306 associates each temperature detected by the temperature detection device 40 with the correction value of the power amplifier 301 at each temperature (i.e., the result of dividing the target amplitude value of the transmitted signal by the actual amplitude value of the transmitted signal, which is the correction factor of the voltage gain of the power amplifier 301) and stores it as a data table TBL2. Figure 7 is a diagram showing an example of a data table TBL2 stored in the storage device 306 according to the second embodiment of this disclosure. As shown in Figure 7, the data table TBL2 is a data table that associates the state of each switch 3016a with the resistance value across the entire resistor 3015a. This data table TBL2 is created in advance by performing the processing described above. The storage device 306 also stores data table TBL1.

[0049] The control device 305 generates a control signal to control the voltage gain Gv of the power amplifier 301 based on the temperature detected by the temperature detection device 40. Specifically, the control device 305 identifies the temperature detected by the temperature detection device 40 in the data table TBL2 stored in the storage device 306, and identifies the correction value associated with that temperature. The control device 305 identifies the state of the switch when the correction value was identified in the data table TBL1 stored in the storage device 306, and identifies the resistance value associated with the identified switch state. Then, the control device 305 identifies the resistance value closest to the result of multiplying the identified resistance value by the identified correction value in the data table TBL1, and identifies the state of the switch associated with the identified resistance value. The control device 305 can then control each of the switches 3016a (i.e., control the voltage gain of the power amplifier 301) using the signal that represents the state of each switch 3016a indicated by the identified switch state as a control signal.

[0050] Next, the processing performed by transmitter 1 will be described. Figure 8 is a diagram showing an example of the processing flow of transmitter 1 according to the second embodiment of this disclosure. It is assumed that the storage device 306 stores data tables TBL1 and TBL2.

[0051] The input device 10 generates a command signal based on the user's operation. The input device 10 outputs the command signal to the signal generator 20.

[0052] The signal generator 20 generates a transmission signal based on the command signal output by the input device 10. The signal generator 20 outputs the transmission signal to the transmission device 30.

[0053] The temperature detection device 40 detects the internal temperature of the transmitter 1. The temperature detection device 40 outputs information indicating the detected temperature to the transmitter 30.

[0054] The control device 305 generates a control signal to control the voltage gain Gv of the power amplifier 301 based on the temperature detected by the temperature detection device 40. Specifically, the control device 305 identifies the temperature detected by the temperature detection device 40 in the data table TBL2 stored in the storage device 306 (step S11). Then, the control device 305 identifies the correction value associated with that temperature in the data table TBL2 (step S12). The control device 305 identifies the state of the switch when that correction value was identified in the data table TBL1 stored in the storage device 306 (step S13). Then, the control device 305 identifies the resistance value associated with the identified switch state in the data table TBL1 (step S14). The control device 305 identifies the resistance value in the data table TBL1 that is closest to the result of multiplying the identified resistance value by the identified correction value (step S15). Then, the control device 305 identifies the state of the switch associated with the identified resistance value (step S16). The control device 305 controls each of the switches 3016a (i.e., controls the voltage gain of the power amplifier 301) using a signal that represents the state of each switch 3016a indicated by the state of the identified switch in the data table TBL1 as a control signal (step S17).

[0055] The transmitter 1 according to the second embodiment of this disclosure has been described above. This transmitter 1 is equipped with a temperature detection device 40. Therefore, in the transmitter 1, when the transmitting device 30 prepares the data table TBL2 by performing the processing described in the first embodiment, it can adjust the voltage gain of the power amplifier 301 based on the temperature inside the transmitter 1 detected by the temperature detection device 40. As a result, it is possible to handle a transmitted signal that is not subject to power constraints by elements that limit the transmitted signal to a predetermined power or less, such as a PIN diode.

[0056] <Modifications of the First and Second Embodiments> In the modified versions of the first and second embodiments, the power amplifier 301 may be an inverting amplifier or a forward-rotating amplifier using an operational amplifier and a resistor, in which the resistance value is changed by the control device 305 in the same manner as the control device 305 in the first and second embodiments.

[0057] Figure 9 shows the minimum configuration of a transmitting device 30 according to an embodiment of the present disclosure. As shown in Figure 9, the transmitting device 30 includes an amplifier 301 and an output device 302. The amplifier 301 amplifies the transmission signal generated in response to a command signal without passing through a first element that limits the transmission signal to a predetermined power or less. The output device 302 transmits the signal after it has been amplified by the amplifier 301.

[0058] Figure 10 shows an example of the processing flow of the minimally configured transmitting device 30 according to the embodiment of this disclosure. Next, the processing by the minimally configured transmitting device 30 according to the embodiment of this disclosure will be described with reference to Figure 10.

[0059] The amplifier 301 amplifies the transmission signal generated in response to the command signal without passing through a first element that limits the transmission signal to a predetermined power or less (step S21). The output device 302 transmits the signal amplified by the amplifier 301 (step S22).

[0060] The minimum configuration of the transmitting device 30 according to the embodiments of this disclosure has been described above. The transmitting device 30 can handle a transmitted signal that is not subject to power constraints imposed by elements that limit the transmitted signal to a predetermined power level or lower, such as a PIN diode.

[0061] In addition, the order of processing in the embodiments of this disclosure may be changed, as long as appropriate processing is performed.

[0062] While embodiments of this disclosure have been described, the transmitter 1, input device 10, signal generator 20, transmission device 30, temperature detection device 40, and other control devices described above may each have a computer system internally. The process described above is stored in program form on a computer-readable recording medium, and the above process is performed when the computer reads and executes this program. A specific example of a computer is shown below.

[0063] Figure 11 is a schematic block diagram showing the configuration of a computer according to at least one embodiment. As shown in Figure 11, computer 5 includes a CPU 6, main memory 7, storage 8, and interface 9.

[0064] For example, each of the above-mentioned transmitter 1, input device 10, signal generator 20, transmission device 30, temperature detection device 40, and other control devices is implemented in computer 5. The operation of each of the above-mentioned processing units is stored in storage 8 in the form of a program. CPU 6 reads the program from storage 8 and loads it into main memory 7, and executes the above-mentioned processing according to the program. Also, CPU 6 allocates memory areas in main memory 7 corresponding to each of the above-mentioned storage units according to the program.

[0065] Examples of storage 8 include HDDs (Hard Disk Drives), SSDs (Solid State Drives), magnetic disks, magneto-optical disks, CD-ROMs (Compact Disc Read Only Memory), DVD-ROMs (Digital Versatile Disc Read Only Memory), and semiconductor memory. Storage 8 may be an internal medium directly connected to the bus of computer 5, or an external medium connected to computer 5 via interface 9 or a communication line. Furthermore, if this program is distributed to computer 5 via a communication line, computer 5, upon receiving the program, may expand it into main memory 7 and execute the above processing. In at least one embodiment, storage 8 is a tangible storage medium that is not temporary.

[0066] Furthermore, the above program may implement some of the functions described above. Moreover, the above program may be a file that can implement the above functions in combination with a program already recorded in the computer system, a so-called differential file (differential program).

[0067] While several embodiments of this disclosure have been described, these embodiments are illustrative and do not limit the scope of the invention. These embodiments may be modified in various ways, without departing from the spirit of the invention. [Explanation of Symbols]

[0068] 1. Transmitter 5. Computers 6..CPU 7. Main Memory 8. Storage 9. Interface 10. Input device 20...Signal generation device 30. Transmitter 40. Temperature detection device 301... Power Amplifier 302... Power detector 303...Detector 304...AD converter 305... Control device 306...Storage device

Claims

1. An amplifier that amplifies a transmission signal generated in response to a command signal without passing through a first element that limits the transmission signal to a predetermined power or less, the amplifier having a plurality of resistors for determining the voltage gain of the amplifier, A control device that changes the connection of the plurality of resistors based on the state of each of the plurality of switches connected to at least one of the plurality of resistors and the total resistance value of the plurality of resistors, An output device that transmits the signal after amplification by the aforementioned amplifier, A transmitting device equipped with the following features.

2. The first element is, It is a PIN diode. The transmitting device according to claim 1.

3. A detection device for detecting the amplified signal, Equipped with, The control device is Based on the command signal that instructs the generation of the transmission signal and the signal detected by the detection device, the connections of the plurality of resistors are changed. A transmitting device according to claim 1 or claim 2.

4. A detection device for detecting temperature in a transmitter equipped with a transmitting device. Equipped with, The control device is Based on the temperature detected by the detection device, the connections of the multiple resistors are changed. A transmitting device according to claim 1 or claim 2.

5. A transmitting device according to any one of claims 1 to 4, A generating device that outputs a transmission signal to the aforementioned transmitting device, A transmitter equipped with the following features.

6. A processing method performed by a transmitting device comprising an amplifier having a plurality of resistors for determining the voltage gain of the self-amplifier, a control device, and an output device, The amplifier amplifies the transmission signal generated in response to the command signal without passing through a first element that limits the transmission signal to a predetermined power or less, The control device changes the connections of the plurality of resistors based on the state of each of the plurality of switches connected to at least one of the plurality of resistors and the total resistance value of the plurality of resistors. The output device transmits the amplified signal, A transmission method that includes [this].

7. An amplifier that amplifies a transmission signal generated in response to a command signal without passing through a first element that limits the transmission signal to a predetermined power or less, the amplifier having a plurality of resistors for determining the voltage gain of the amplifier, the computer of the transmitting device The connection of the plurality of resistors is changed based on the state of each of the plurality of switches connected to at least one of the plurality of resistors and the total resistance value of the plurality of resistors. Transmitting the amplified signal, A program that executes the command.

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