WO2004091035A1 - 広帯域回路 - Google Patents
広帯域回路 Download PDFInfo
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- WO2004091035A1 WO2004091035A1 PCT/JP2004/004089 JP2004004089W WO2004091035A1 WO 2004091035 A1 WO2004091035 A1 WO 2004091035A1 JP 2004004089 W JP2004004089 W JP 2004004089W WO 2004091035 A1 WO2004091035 A1 WO 2004091035A1
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- line
- signal
- line element
- frequency band
- circuit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
Definitions
- the present invention relates to a wide-band circuit capable of obtaining desired circuit characteristics over a wide frequency band, and in particular, to stably obtain desired broad-band circuit characteristics with a small number of circuit elements and to easily design a circuit.
- a possible broadband circuit Conventional technology
- v is the force applied to both ends of the element
- I is the current flowing through the element.
- the impedance of the capacitor is expressed as lZjcoC.
- the impedance of a coil having an inductance L is represented as j co L. Note that the resistance impedance is treated as a resistance value that has no frequency dependence.
- the impedance of these elements is a value that includes ⁇ that is proportional to the frequency of the alternating current, and the characteristics of the capacitor are values that are inversely proportional to the frequency of the alternating current. Is proportional to the frequency of the alternating current.
- Passive AC circuits using capacitors have the characteristic that the impedance decreases as the frequency increases (using the capacitance characteristic, and by using the capacitor as a low impedance element, the desired circuit characteristics can be obtained). It is designed.
- the characteristics of the above capacitors are ideal characteristics, As shown in Fig. 1 (a), the capacitor has the same characteristics as an equivalent circuit in which coils and resistors are connected in series as parasitic elements.
- Fig. 1 (b) The relationship between frequency and impedance in this case is as shown in Fig. 1 (b), and the impedance of the equivalent circuit including the parasitic element decreases as the frequency increases up to the resonance frequency. After the minimum, the impedance increases as the frequency increases.
- the equivalent circuit including the parasitic element is located in a frequency band higher than the resonance frequency. As the frequency becomes higher, the difference from the ideal capacitor characteristic becomes larger. For this reason, a passive AC circuit using a capacitor impairs circuit characteristics in a frequency band higher than the resonance frequency. .
- Patent Document 1 As a conventional technique for obtaining desired circuit characteristics even in a high-frequency band, there is “a high-frequency electronic circuit and a mounting structure of a three-terminal chip capacitor on the high-frequency electronic circuit” disclosed in Patent Document 1.
- Patent Document 1 The invention disclosed in Patent Document 1 is an invention that obtains desired circuit characteristics in a high frequency band by using a three-terminal chip capacitor as a low impedance element.
- Patent Document 1 Japanese Patent Application Publication No. JP-A-2001-1 0-185885
- FIG. 2 shows an equivalent circuit of a filter using a three-terminal chip capacitor applied to the invention disclosed in Patent Document 1.
- Fig. 3 shows the transmission characteristics of this equivalent circuit.
- This filter achieves a low transmittance of 80 dB at a frequency higher than the conventional one near 20 MHz, but in a frequency band below the cut-off wave number, the transmittance decreases as the frequency increases, and the cutoff The transmittance is minimized due to the frequency, and the frequency increases in the frequency band above the cut-off frequency.
- the property that the transmittance increases as the temperature increases is no different from a conventional filter circuit using a capacitor.
- the coil also has a parasitic element as shown in Fig. 4 (a).
- the actual coil exhibits the same characteristics as an equivalent circuit in which resistors are connected in series and capacitors are connected in parallel.
- the circuit is more susceptible to the effect of the operating environment, and the stability and reliability of circuit characteristics are likely to be impaired. For example, even if a filter circuit formed on a circuit board has desired characteristics, the desired characteristics may not be obtained if the circuit board is arranged in a housing.
- the present invention has been made in view of such a problem, and provides a circuit device having a small number of circuit elements, stably obtaining desired circuit characteristics over a wide frequency band, and An object is to provide a broadband circuit capable of circuit design.
- the broadband circuit examples include a filter circuit (a low-pass filter, a high-pass filter, a band-pass filter, a band elimination filter, and the like), a terminal circuit, and the like.
- a filter circuit a low-pass filter, a high-pass filter, a band-pass filter, a band elimination filter, and the like
- terminal circuit a terminal circuit, and the like.
- these wideband circuits can obtain desired circuit characteristics in a frequency band including 100 MHz to 100 GHz, and can be generally used in digital signal circuits. It is preferable that Disclosure of the invention
- a circuit element is connected via a transmission line having a signal transmission conductor, a ground conductor, and a dielectric interposed between these conductors.
- a broadband circuit that has a four-terminal line structure in which a pair of conductors face each other, has lower impedance than the conductor connected to any of the terminals, and has a wavelength shorter than approximately four times the length of the line.
- a line element whose frequency band is the target frequency band is inserted into the transmission line, and a low impedance element for electromagnetic waves in the target frequency band is inserted.
- a wideband circuit characterized by being used as a child.
- a broadband circuit according to the first aspect of the present invention, wherein the signal source outputs a signal electromagnetic wave by a transmission line having a line element inserted therein. And a passive element connected in response to the input signal, wherein the line element inserted into the transmission line includes at least a part of the spectrum of the signal electromagnetic wave in the target frequency band.
- a wide-band circuit characterized in that one of the pair of conductors of the line element has one end connected to the output terminal of the signal source, the other end connected to the input terminal of the passive element, and the other end connected to ground. It provides the following.
- the signal source and the line element are connected via an element mainly having a reactance component in the target frequency band, or the signal source and the line element are connected via a resistor.
- the frequency components within the target frequency band of the line element are reflected by the line element, and the frequency components outside the target frequency band of the line element pass through the line element.
- the direct current component propagates to the passive element side via the line element and is transmitted to the passive element side via one of the pair of conductors of the line element connected to the signal source and the passive element.
- the broadband circuit according to the first aspect, wherein a signal for outputting a signal electromagnetic wave by a transmission line in which a line element is inserted.
- a broadband circuit in which a source and a passive element that operates in accordance with an input signal are connected, wherein the line element inserted into the transmission line covers at least a part of the spectrum of the signal electromagnetic wave in a target frequency band.
- One end of the pair of conductors of the line element is connected at one end to the output terminal of the signal source and the other end is electrically open, and the other end is connected to the input terminal of the passive element at the other end.
- at least one end connected to ground via an element mainly having a reactance component in a target frequency band.
- a broadband circuit further comprising: a signal source that outputs a signal electromagnetic wave by a transmission line in which a line element is inserted.
- a broadband circuit in which a passive element that operates in accordance with an input signal is connected, and a line element inserted into a transmission line is a signal electromagnetic wave spike.
- One of the pair of conductors of the line element has one end connected to the output terminal of the signal source and the other end electrically open, and the other end connected to the passive element side. Is connected to the input terminal of the passive element, and at least one end is connected to ground via a resistor.
- a frequency component within a target frequency band of the line element is a pair of the line element.
- the signal propagates to the passive element side, and the frequency component outside the target frequency band of the line element enters the line element. It is preferable to attenuate.
- the broadband circuit according to the first aspect, wherein the transmission line in which the first and second line elements are inserted has a signal electromagnetic wave.
- a broadband circuit in which a signal source that outputs the signal and a passive element that responds to the input signal are connected, wherein the first and second line elements generate at least a part of the spectrum of the signal electromagnetic wave.
- One of the pair of conductors of the first line element has one end connected to the output terminal of the signal source and the other end electrically open, and itt is the opposite side of the signal source.
- the first line element, the second line element, and the force are connected via an element or a resistor mainly having a reactance component in a target frequency band of the second line element.
- a frequency component within a target frequency band of the first line element is a second line element of the pair of conductors of the first line element. Propagating to the second line element side via a line including one of the conductors connected to the first conductor and the ground, the frequency component outside the target frequency band of the first line element enters the line element. Signal attenuated and propagated to the second line element Of the electromagnetic wave, a frequency component in the target frequency band of the second line element is reflected by the second line element, and a frequency component outside the target frequency band of the second line element is the second frequency element. It is preferable that the signal propagates to the passive element through the line element.
- a signal is transmitted by a transmission line in which the first and second line elements are inserted.
- a broadband circuit in which a signal source that outputs an electromagnetic wave and a passive element that responds to an input signal are connected, wherein the first and second line elements include at least a part of a spectrum of the signal electromagnetic wave.
- Each of the pair of conductors of the first line element has one end connected to the output terminal of the signal source and the other end connected to one of the pair of conductors of the second line element, respectively.
- the other end is connected to the land, one end of the pair of conductors of the second line element is connected to the first line element, the other end is electrically open, and the other is a passive element. Is connected to the input terminal of the passive element In, it is to «a broadband circuit, wherein at least one end connected to the ground via the elements or resistance having predominantly reactance component Te target frequency band smell of the second line element.
- the frequency component in the target frequency band of the first line element is reflected by the first line element,
- the frequency component outside the target frequency band of the first line element propagates through the first line element to the second line element, and out of the signal electromagnetic waves propagated to the second line element,
- the frequency component of the target frequency band ⁇ of the second line element propagates to the passive element side through a line including one of the pair of conductors of the second line element connected to the input terminal of the passive element and the duland.
- frequency components outside the frequency band of interest of the second line element is preferably attenuated in entering the line elements of the second.
- the signal is transmitted by a transmission line in which the first and second line elements are inserted.
- a broadband circuit in which a signal source that outputs an electromagnetic wave and a passive element that operates according to an input signal are connected, wherein the first and second line elements include at least a part of a spectrum of the signal electromagnetic wave.
- One of the pair of conductors of the first line element has one end connected to the output terminal of the signal source and the other end connected to the passive element.
- each of the pair of conductors of the second line element is connected to the output terminal of the signal source and the other end is electrically open;
- the other end of the passive element is connected to the input terminal of the passive element, and at least one end is connected to the target frequency band of the second line element and grounded through an element or a resistor mainly having a reactance component.
- the frequency components within the target frequency band of the first line element are equal to a pair of the first line element.
- the signal source and the first line element are each an element or a resistor mainly having a reactance component in a target frequency band of the first line element. Preferably it is connected via.
- the present invention provides, as an eighth aspect, in the broadband circuit according to the first aspect, a signal source for outputting a signal electromagnetic wave by a transmission line in which a line element is inserted, and an input.
- a broadband circuit connected to a passive element to be connected to the transmission signal, wherein the line element inserted into the transmission line includes a spectrum of a signal electromagnetic wave in a target frequency band, and includes a pair of line elements.
- One of the conductors has one end connected to the output terminal of the signal source and the other end connected to the input terminal of the passive element, and the other end has at least one end connected to a land through a terminating resistor. That is.
- the frequency component in the target frequency band of the line element is connected to the signal source and the passive element of the pair of conductors of the line element. Propagation to the passive element side via a line including one and the durand, the frequency component outside the target frequency band of the line element propagates to the passive element side via the line element, and the DC component Signal out of a pair of conductors It is preferable that the light is transmitted to the passive element via one of the source and the passive element. Further, in order to achieve the above object, the present invention provides, as a ninth aspect, the broadband circuit according to the first aspect.
- the signal line that outputs the signal electromagnetic wave and the passive element that performs fm according to the input signal are connected by the transmission line into which the first line element power S is input, and the power that supplies power to the signal source
- One of the pair of conductors of the first line element has one end connected to the output terminal of the signal source and the other end connected to the input terminal of the passive element, and the other has at least one end connected to the second line via a terminating resistor. Connected to a pair of second line elements.
- One provides a broadband circuit characterized in that one end is connected to the first line element via a terminating resistor, the other end is connected to a power source, and »is both ends connected to ground. It is.
- the frequency component in the target frequency band of the first line element is a signal component of the pair of conductors of the first line element. Propagation to the passive element side via a line including the ground connected to the source and the passive element, and a frequency component outside the target frequency band of the first line element is transmitted through the first line element. It is preferable that the direct-current component propagated to the passive element side and transmitted to the passive element side via one of the pair of conductors of the first line element connected to the signal source and the passive element.
- the terminating resistor is a signal transmission conductor connected to an end of the conductor of the line element to which the terminating resistor is connected, to which the terminating resistor is not connected. It is preferable to have an impedance equal to.
- a line element is further disposed on a power supply line connecting the signal source and a power source for supplying power to the signal source, and one end of a pair of conductors of the line element disposed on the power supply line has one end.
- the other end of the signal source is connected to a power source, and the other end is connected to ground.
- the signal transmission conductor is a rooster pattern and the ground conductor is connected to the ground plane and the ground plane.
- Signal source and passive components on a printed circuit board formed as The line element mounted on the printed circuit board may be inserted into the transmission line with at least one end of each of the pair of conductors being connected to a signal transmission conductor and a ground conductor, respectively. preferable.
- FIG. 1 is a diagram showing an equivalent circuit of a capacitor including a parasitic element and its frequency characteristic.
- FIG. 2 is a diagram illustrating a configuration of a three-terminal filter circuit.
- FIG. 3 is a diagram illustrating transmission characteristics of a three-terminal filter circuit.
- FIG. 4 is a diagram showing an equivalent circuit of a coil including a parasitic element and its frequency characteristic.
- FIG. 5 is a diagram illustrating an example of a line structure.
- FIG. 6 is a diagram showing the relationship between the impedance of the line structure element and the frequency.
- FIG. 7 is a diagram showing a configuration of an LPF circuit according to a first embodiment of the present invention.
- FIG. 8 is a diagram showing an example of the structure of LILC.
- FIG. 9 is a diagram illustrating a mounting example of LILC applied to the LPF circuit according to the first embodiment.
- FIG. 10 illustrates the LPF circuit according to the first embodiment.
- FIG. 3 is a diagram for explaining a process in which a luth signal wave is transmitted.
- FIG. 11 is a diagram illustrating transmission characteristics of the LPF circuit according to the first embodiment.
- FIG. 12 is a diagram showing a configuration of an LPF circuit according to a second embodiment of the present invention.
- FIG. 13 is a diagram illustrating transmission characteristics of the LPF circuit according to the second embodiment.
- FIG. 14 is a diagram showing a configuration of an LPF circuit according to a third embodiment of the present invention.
- FIG. 15 is a diagram illustrating a configuration of an HPF circuit according to a fourth embodiment in which the present invention is preferably implemented.
- FIG. 16 shows an implementation example of LILC applied to the HPF circuit according to the fourth embodiment.
- FIG. 17 is a diagram for explaining a process of transmitting a pulse signal wave in the HPF circuit according to the fourth embodiment.
- FIG. 18 is a diagram illustrating transmission characteristics of the HPF circuit according to the fourth embodiment.
- FIG. 19 is a diagram illustrating a configuration of an HPF circuit according to a fifth embodiment in which the present invention is preferably implemented.
- FIG. 20 is a diagram illustrating an implementation example of an LILC applied to the HPF circuit according to the fifth embodiment.
- FIG. 21 is a diagram illustrating a configuration of an HPF circuit according to a sixth embodiment in which the present invention is preferably implemented.
- FIG. 22 is a diagram illustrating a mounting example of LILC applied to the HPF circuit according to the sixth embodiment.
- FIG. 23 is a diagram showing a configuration of a BPF circuit according to a seventh embodiment in which the present invention is preferably implemented.
- FIG. 24 is a diagram for explaining the operation of the BPF circuit according to the seventh embodiment.
- A shows the spectrum of the Panoreth signal wave.
- (b) shows the transmission characteristics of HPF.
- (c) shows the transmission characteristics of the LPF.
- (d) shows the transmission characteristics of the BPF circuit.
- FIG. 25 is a diagram illustrating a configuration of a BEF circuit according to an eighth embodiment in which the present invention is preferably implemented.
- FIG. 26 is a diagram for explaining the operation of the BEF circuit according to the eighth embodiment.
- A shows the spectrum of the pulse signal wave.
- (b) shows the transmission characteristics of HPF.
- C shows the transmission characteristics of the LPF.
- (d) shows the transmission characteristics of the BEF circuit.
- FIG. 27 is a diagram illustrating a configuration of a high-frequency termination circuit according to a ninth embodiment in which the present invention is preferably implemented.
- FIG. 28 is a diagram illustrating a mounting example of LILC applied to the high-frequency termination circuit according to the ninth embodiment.
- FIG. 29 shows a process of transmitting a noise signal wave in the high-frequency circuit according to the ninth embodiment. It is a figure for explaining.
- FIG. 30 is a diagram illustrating a configuration of a high-frequency termination circuit according to a tenth embodiment in which the present invention is preferably implemented.
- FIG. 31 is a diagram showing an implementation example of LILC applied to the high-frequency termination circuit according to the tenth embodiment.
- FIG. 32 is a diagram illustrating a configuration of a high-frequency termination circuit according to a first embodiment in which the present invention is preferably implemented.
- FIG. 33 is a diagram illustrating an implementation example of an LILC applied to the high-frequency termination circuit according to the first embodiment.
- FIG. 34 is a diagram illustrating a configuration of a high-frequency termination circuit according to a twelfth embodiment in which the present invention is preferably implemented.
- FIG. 35 is a diagram illustrating an implementation example of an LILC applied to the high-frequency termination circuit according to the twelfth embodiment.
- FIG. 36 is a diagram for explaining a process of transmitting a pulse signal wave in the high-frequency termination circuit according to the twelfth embodiment.
- FIG. 37 is a diagram illustrating a configuration of a high-frequency termination circuit according to a thirteenth embodiment in which the present invention is preferably implemented.
- FIG. 38 is a diagram illustrating an implementation example of an LILC applied to the high-frequency termination circuit according to the thirteenth embodiment.
- FIG. 39 is a diagram illustrating a configuration of a high-frequency termination circuit according to a fourteenth embodiment in which the present invention is preferably implemented.
- FIG. 40 is a diagram illustrating an implementation example of an LILC applied to the high-frequency termination circuit according to the fourteenth embodiment.
- the symbols la, 2a, 4a and 5a represent high frequency signals.
- the symbols lb, 2b, 4b and 5b represent low frequency signals.
- Symbols 1c, 4c and 5c represent DC signals.
- Signs 10a, 10b, 10c, 10d, 20a, 20c, 20d, 30a, 30b, 30c, 30d, 40a, 40b, 40c, 40d, 50a, 50b, 50 c and 50 d represent the rooster fiber pattern.
- Reference numerals 11, 21, 31, 41 and 51 represent drivers.
- Reference numerals 12, 23, 24, 322 and 332 represent coils.
- Sign 13, 22, 42, 46, 47, 52, 56, 57, 321 and 331 represent LILC.
- References 19 43, 44, 53 and 54 represent resistors.
- Reference numerals 81a and 81b represent ground conductors.
- Reference numeral 82 indicates a signal transmission conductor.
- Reference numerals 83 and 133 represent a dielectric.
- Reference numerals 111, 112, 211, 212, 311, 312, 411, and 412 represent inverter buffers.
- Code 11 1a, 11 lb, 112a, 112b, 211a, 211b, 212a, 212b, 311a, 311b, 312a, 312b, 411a, 411b, 412a, 412b , 511a, 511b, 512a and 512b represent transistors.
- Reference numeral 130 represents a sealing material.
- Reference numeral 131 represents a first conductor.
- Reference numeral 132 represents a second conductor.
- the present invention provides a desired circuit over a wide frequency band by forming an electronic circuit using a low-impedance line structure component (hereinafter, referred to as LI LC) in place of a capacitor in a four-terminal line structure.
- LI LC low-impedance line structure component
- the characteristic impedance of the line is calculated by (L / C) 1/2 , and becomes a value determined only by the capacitance component and the inductance component.
- the impedance of the element having the line structure is lowered (that is, the element having the line structure is set as LI LC).
- the parameters related to the impedance of the elements of the line structure include L (inductance), C (capacitance), R (resistance), and G (conductance). Since problems such as an increase in power supply voltage fluctuation during switching occur, it is necessary to lower the impedance by adjusting C.
- the path length of the LILC needs to be sufficiently longer than the wavelength of the electromagnetic wave flowing therethrough.
- the transmission coefficient (S21) of the line including the loss can be obtained by equation (3).
- transmission The reciprocal of the characteristic is called the insertion loss.
- X in Eq. (3) is the line length.
- a is the attenuation constant that constitutes the propagation constant, and is expressed by equation (4).
- the conductance G in Eq. (4) can be expressed by Eq. (5) using t a ⁇ ⁇ used in the capacitor.
- S is the area of the dielectric
- t is the thickness of the dielectric.
- the electromagnetic wave enters the line element because the line element has a low impedance but a finite impedance value. .
- the electromagnetic wave that has entered the inside of the line element exponentially attenuates and hardly goes out. That is, by adding an appropriate loss to the LI LC, the termination for the LI LC does not have to be considered. Note that the insertion loss is the product of the impedance mismatch and the element length, frequency, and exponential multiple of ta ⁇ .
- the impedance of the electronic circuit is low enough to achieve the desired characteristics. (The capacitance C per unit length is preferably large.)
- the relationship between frequency and impedance is as shown in Fig. 6.
- the impedance is not affected by the parasitic element, and the impedance does not increase.
- the structure of the LI LC is not limited to the strip structure, but may be a microstrip line structure or a coaxial cylindrical line structure. May be.
- Fig. 7 shows the configuration of a low-pass filter circuit (LPF circuit) to which the present invention is applied.
- This circuit has a driver 11, a LILC 13 and a receiver 14.
- the driver 11 has an inverter buffer 111 and an inverter buffer 112, and the inverter buffer 111 and the inverter buffer 112 connected in series form a buffer circuit.
- Inverter buffer 111 has transistors 111a and 111b
- inverter buffer 112 has transistors 112a and 112b.
- the high-side transistors 111a and 112a are P-channels, and are turned off when the gate ff is at a high level.
- the low-side transistors 111b and 112b are N-channel, and are turned on when the gate is at a high level.
- V DD is supplied to the drain terminals of the transistors 111 a and 112 a from a power supply (not shown).
- the transistors 11 1 a and 11 1 b output a signal wave by switching V DD according to the gate voltage input to the input terminal of the inverter buffer 111 by the control unit (not shown), and output the signal wave to the input terminal of the inverter buffer 112. input.
- the transistors 112a and 112b generate a signal wave by switching V DD according to the signal wave input to the gate terminal, and this signal wave is output from the driver 11 as a signal electromagnetic wave.
- the LILC 13 is an element having a four-terminal line structure in which a pair of conductors oppose each other with a dielectric interposed therebetween, and the characteristic impedance Z 0 is a characteristic impedance Z 1 of a cock 18 a connecting the driver 11 and the LILC 13.
- the terminal 13 a of 13 is connected to the output terminal of the dry cell 11, and the terminal 13 b is connected to the input terminal of the receiver 14.
- the terminals 13c and 13d are connected to the ground.
- the receiver 14 is a transistor that converts a signal input to an input terminal (gate terminal) into a voltage.
- FIG. 8 shows a structural example of LILC 13 applied to the LPF circuit according to the present embodiment. Note that (a) and (b) show the same configuration from different viewpoints.
- a dielectric 133 is arranged so as to surround the first conductor 131.
- the first conductor 131 and the second conductor 132 are provided so as to face each other with the dielectric 133 interposed therebetween, and are fixed as they are by the sealing material 130.
- the first electrode 131 is provided with terminals 13a and 13b
- the second electrode 132 is provided with terminals 13c and 13d, each of which extends to the bottom side of the LILC 13 and is sealed. It penetrates the stopper 130 and is exposed (or projected) to the outside. By connecting each terminal exposed (or protruding) from the sealing material 130 to the signal transmission conductor and the ground conductor, the LILC 13 can be inserted into the transmission line. .
- FIG. 9 shows a state in which LILC 13 is arranged in a rooster 3 ⁇ pattern on a printed circuit board.
- the sealing material 130 is not shown in the drawing to facilitate understanding of the state of the LILC 13 (the same applies to other embodiments).
- Terminal 13a is connected to rooster & wire pattern 10a connected to the output terminal of dryno 11.
- the terminal 13b is a tori pattern 10b connected to the gate terminal of the receiver 14.
- the terminal 13c and the terminal 13d are respectively connected to the rooster 2 ⁇ pattern 10c and the rooster & line pattern 10d connected to Durand.
- FIG. 10 shows a state where the pulse signal wave output from the driver 11 is transmitted through the LPF circuit.
- the pulse signal wave output from the driver 11 reaches the LILC 13 via a line including the oscillating wire 18a and the ground. No, who reached LILC 13.
- LI The electromagnetic wave component (high-frequency signal la) that can be considered as a line with LCI 3 is affected by the mismatch between the impedance of the 3 ⁇ 4 line 18 a and the impedance of the LILC 13.
- Z OZZ 1 ⁇ the high-frequency signal 1 a is reflected by the LI LC 13.
- the electromagnetic wave component having a low frequency (low-frequency signal 1b) cannot be regarded as a line because the LILC 13 is not regarded as a line. Therefore, the low-frequency signal 1b enters the LILC 13 without being reflected, and propagates to the receiver 14 through the LILC 13 dielectric portion. The DC signal 1 c passes through the conductor of the LILC 13 to the receiver 14 side.
- the low-frequency signal 1 b and the transmitted DC signal 1 c transmitted to the receiver 14 enter the gut terminal of the receiver 14 and cause the receiver 14 to ft ft.
- the receiver 14 operates according to only the low-frequency signal and the DC signal of the noise signal wave generated by the dry cell 11.
- FIG. 11 shows a transmission characteristic diagram of the LPF circuit.
- the vertical axis is the transmittance (dB), and the horizontal axis is the frequency ( ⁇ ) ⁇ of the incident wave.
- dB transmittance
- ⁇ frequency
- a constant impedance is obtained irrespective of the frequency, and since the circuit is formed using LI having a large dielectric loss of ⁇ 5 , the circuit is parasitic even in a frequency band higher than the cut-off frequency.
- the transmission characteristics do not deteriorate due to the influence of the element.
- the LPF circuit according to the present embodiment has a low transmittance with respect to an electromagnetic wave having a frequency higher than the cut-off frequency, and has a circuit characteristic close to that of an ideal LPF circuit. Show.
- the cut-off frequency can be set to an arbitrary value by changing the substantial length (effective line length) of the line portion of the LI LC13, and the aspect ratio (line portion of the LI LC13 line) can be set.
- the width of the line and the distance between the pair of conductors) and of the insulator are fixed, the length of the line portion of the LILC 13 and the cutoff frequency are in inverse proportion. This is not limited to the LPF circuit, but is the same for all the embodiments.
- the LPF circuit according to the present embodiment does not perform any na
- it is a broadband circuit that can be easily designed without resorting to the cut-and-try method. Also, since the number of design parameters is small, the stability and reliability of circuit characteristics can be improved.
- FIG. 12 shows the configuration of a low-pass filter circuit (LPF circuit) to which the present invention is applied.
- LPF circuit low-pass filter circuit
- This circuit is the same as the first embodiment except that a coil 12 is further provided between the driver 11 and the LILC 13.
- the coil 12 is an element arranged to improve the characteristics of the low-pass filter.
- the operation of the LPF circuit is the same as that of the first embodiment.
- FIG. 13 shows a transmission characteristic diagram of the LPF circuit.
- the vertical axis is the transmittance (dB), and the horizontal axis is the frequency (Hz) of the incident wave.
- the coil 12 disposed between the driver 11 and the LI LC 13 (in other words, inserted into 12 ⁇ 18a) exhibits an inductance characteristic in a low frequency band.
- the capacitance characteristic of the LI LC 13 acts synergistically, and when the frequency exceeds a predetermined frequency, the transmittance sharply decreases.
- the coil 12 exhibits capacitance characteristics in the high frequency band, but the low impedance characteristics of the LIL C13 do not change even in the high frequency band, and the dielectric loss is slightly increased, so even in a frequency band higher than the cut-off frequency.
- the transmittance of the LPF circuit does not increase.
- the LPF circuit according to the present embodiment has a low transmittance for electromagnetic waves having a frequency higher than the resonance frequency, and is close to an ideal LPF circuit. ⁇ Show circuit characteristics.
- the LPF circuit according to the present embodiment is a wideband circuit that can be easily designed without performing any computation and without relying on the cut-and-try method. Also, since the number of design parameters is small, the stability and reliability of circuit characteristics can be improved. [Third embodiment]
- Fig. 14 shows the configuration of a single-pass filter circuit (LPF circuit) to which the present invention is applied.
- This circuit is the same as the first embodiment, except that the circuit further includes a resistor 19 between the driver 11 and the LILC 13.
- the coil 19 is an element arranged to improve the characteristics of the low-pass filter.
- the operation of the LPF circuit is the same as in the first embodiment.
- the capacitance characteristics of the LI LC 13 do not change even in a high frequency band, and the dielectric loss is slightly increased, the transmittance of the LPF circuit is maintained even in a frequency band equal to or higher than the cutoff frequency. Don't get bigger.
- the LPF circuit according to the present embodiment has a low transmittance for electromagnetic waves having a frequency higher than the resonance frequency, and is a circuit close to an ideal LPF circuit. Show characteristics.
- the LPF circuit according to the present embodiment is a wideband circuit that can be easily designed without performing difficult calculations and without relying on the cut-and-try method. Also, since the number of design parameters is small, the stability and reliability of circuit characteristics can be improved.
- FIG. 15 shows the configuration of a high-pass filter circuit (HPF circuit) to which the present invention is applied.
- This HPF circuit has a driver 21, a LI LC 22, a coil 23, and a receiver 25.
- Driver 21 is composed of transistors 211 and 212
- the driver 21 has the same configuration as the driver 11 of the first embodiment, and outputs a signal electromagnetic wave from an output terminal.
- the LI LC 22 is a four-terminal line structure element in which a pair of conductors are opposed to each other with a dielectric interposed therebetween, and its characteristic impedance Z 0 is the characteristic impedance Z of the rooster 28 a that connects the dry loop 21 and the LI LC 22. It is set extremely small (Z0 / Z20) compared to 2.
- the terminal 22a of the LI LC 22 is connected to the output terminal of the dry loop 21, and the terminal 22b is open.
- the terminal 22c is connected to the ground via the coil 23.
- Terminal 22 d is connected to the input terminal of receiver 25.
- the coil 23 is an element arranged to improve the characteristics of the high-pass filter.
- the receiver 25 is a transistor that converts a signal input to an input terminal (gate terminal) into a voltage.
- Fig. 16 shows a state where the LILC22 is arranged in a rooster pattern on a printed circuit board.
- the terminal 22a is connected to a stranded wire pattern 20a connected to the output terminal of the driver 21.
- Terminal 22b is open without being connected to any of the wire patterns.
- the terminal 22e is connected via a coil 23 to an IB ⁇ pattern 20c connected to the ground.
- the terminal 22 d is connected to the fiber pattern 20 d connected to the gate terminal of the receiver 25.
- FIG. 17 shows a state in which the pulse signal wave output from the driver 21 is transmitted through the LPF circuit.
- the pulse signal wave output from the driver 21 reaches the LIL 22 via a line including the line 28a and the ground.
- the DC component (DC signal) of the noise signal is not transmitted.
- the electromagnetic wave component (high-frequency signal 2a) of the pulse signal wave that has reached LILC22 which has a high frequency and can be regarded as a line, has a mismatch between the impedance of the LILC22 and the impedance of LILC22.
- the high-frequency signal does not enter the inside of the LILC 22, and as shown in (b), one of the conductors of the LILC 22 connected to the ground via the coil 23 and the ground are connected to the ground. Between The signal passes through to the gate terminal of the receiver 25. That is, the high-frequency signal travels to the receiver 25 side, bypassing the LILC 22, via a line including one of the conductors of the LILC 22 including the terminals 22c and 22d and the ground plane.
- the low-frequency electromagnetic wave component (low-frequency signal 2b) of the pulse signal wave that has reached LI C22 is affected by the mismatch between the impedance of the bird 5; Penetrates into the dielectric inside the LI LC 22 without any noise, but does not reach the receiver 25 because the terminal 22b is electrically open and attenuates inside the LI LC 22 because the dielectric loss is slightly increased. I do.
- the high-frequency signal that has entered the gate terminal of the receiver 25 causes the receiver 25 to be activated.
- the receiver 25 operates according to only the high-frequency signal out of the signal waves generated by the driver 21.
- Figure 18 shows the transmission characteristics of this HPF circuit.
- the vertical axis is the transmittance (dB), and the horizontal axis is the frequency (Hz) of the incident wave.
- the coil 23 connecting the terminal 22c of the LI LC22 and the ground exhibits inductance characteristics in a low frequency band. When the frequency exceeds a predetermined frequency, the transmittance sharply increases.
- the HPF circuit according to the present embodiment has a high electromagnetic wave transmittance higher than the cutoff frequency and in the frequency band, and is close to an ideal HPF circuit. Shows circuit characteristics.
- the HPF circuit according to the present embodiment is a wideband circuit that can be easily designed without performing naive calculations and without relying on the cut-and-try method. Also, since the number of design parameters is small, the stability and reliability of circuit characteristics can be improved.
- Fig. 19 shows the configuration of a high-pass filter circuit (HPF circuit) to which the present invention is applied.
- FIG. 20 shows a state where LILC22 is arranged in a rooster S / line pattern on a printed circuit board.
- the terminal 22 a is connected to the ⁇ pattern 20 a connected to the output terminal of the driver 21.
- Each of the terminals 22b and 22c is open without being connected to the rooster ⁇ 3 ⁇ 4 pattern.
- the terminal 22 d is connected to the fiber pattern 20 d connected to the gate terminal of the receiver 25 and the ground via the coil 24.
- the operation of the HPF circuit is the same as in the fourth embodiment.
- the transmission characteristic is the same as that of the fourth embodiment, and the capacitor 24 that connects the terminal 22 d of the LILC 22 to the ground has a low frequency band and an inductance characteristic. Therefore, the inductance characteristic of the coil 24 and the capacitance characteristic of the LILC 22 act synergistically, and when the frequency exceeds a predetermined frequency, the transmittance sharply increases. In addition, the transmission of electromagnetic waves is kept high even in the frequency band higher than the cutoff frequency! / Near the ideal HPF circuit! / ⁇ Shows circuit characteristics.
- the HPF circuit according to the present embodiment is a wideband circuit that can be easily designed without performing a complicated calculation and without relying on the cut-and-try method.
- the number of design parameters is small, it is possible to improve the stability and reliability of circuit characteristics.
- Figure 21 shows the configuration of a high-pass filter circuit (HPF circuit) to which the present invention is applied.
- HPF circuit high-pass filter circuit
- This HPF circuit is the same as the fourth embodiment except that the terminal 22 d is also connected to the ground via the coil 24.
- Figure 22 shows a state where LILC22 is arranged on the @E line pattern on the printed circuit board.
- the terminal 22a is connected to the fiber pattern 20a connected to the output terminal of the driver 21.
- the terminal 22b is open without being connected to the ⁇ pattern.
- the terminal 22 c is connected to the ⁇ pattern 20 c connected to the ground via the coil 23.
- the terminal 22 d is connected to the cock fl / line pattern 20 d connected to the gate terminal of the receiver 25 and the ground.
- the operation of the HPF circuit is the same as in the fourth embodiment.
- the transmission characteristics Similar to the fourth embodiment but since the LI LC 22 has two coils (coinoles 23 and 24), the filter characteristics in the low frequency band can be changed to the circuit characteristics of an ideal HPF circuit. It becomes possible to approach.
- the HPF circuit according to the present embodiment is a broadband circuit that can be easily designed without performing difficult calculations and without relying on the cut-and-try method. Also, since the number of design parameters is small, the stability and reliability of circuit characteristics can be improved.
- the coil 22 and the coil 24 are connected to the terminal 22 of the LILC 22.
- the same effect can be obtained by using a resistor instead of the coil.
- a combination of a coil and a resistor may be used.
- the LPF circuit to which the present invention is applied is described.
- the HPF circuit to which the present invention is applied has been described.
- the present invention can be applied to circuits and band elimination filter circuits.
- FIG. 23 shows a configuration of a bandpass filter circuit (BPF circuit) to which the present invention is applied.
- BPF circuit bandpass filter circuit
- This BPF circuit is a circuit in which a driver 31, an HPF 32, an LPF 33, and a receiver 34 are connected in series.
- the driver 31 is the same as the driver 11 of the first embodiment, and outputs a signal electromagnetic wave from an output terminal.
- the HPF 32 has the same configuration as the HPF circuit according to the fourth embodiment, and has a LI LC 321 and a coil 322.
- the LILC 321 is a four-terminal line structure element in which a pair of conductors oppose each other with a dielectric interposed between them.
- the characteristic impedance Z 0a is the characteristic of the B-line 38a connecting the driver 31 and the LILC 321. It is extremely small (ZO a Z3 a 0) compared to the impedance Z 3 a.
- the terminal 321a of the LI LC321 is connected to the output terminal of the driver 31, and the terminal 321b is open.
- terminal 321 c is connected to the ground via the coil 322.
- Terminal 32 Id is the input terminal of LPF 33.
- the LI LC 321 can be arranged in a woven fiber pattern on a printed circuit board in the same manner as in the fourth embodiment.
- the coil 322 is an element arranged to improve the characteristics of the high-pass filter.
- the LPF 33 has the same configuration as the LPF circuit according to the second embodiment, and includes a LILC331 and a coil 332.
- the LILC 331 is an element having a four-terminal line structure opposed to each other with a pair of conductor force S dielectrics interposed therebetween.
- the characteristic impedance Z 0 b is the characteristic impedance Z 1 It is set very small (Z 0 bZZ 1 b 0) compared to b.
- Terminal 331a of LILC331 is connected to LILC321d which is an output terminal of HPF32, and terminal 331b is connected to an input terminal of receiver.
- the terminal 331c and the terminal 331d are connected to the ground.
- the LI LC331 can be arranged in a rooster pattern on the pudding substrate in the same manner as in the second embodiment.
- the coil 332 is an element arranged to improve the characteristics of the low-pass filter.
- the receiver 34 is a transistor that converts a signal input to an input terminal (gate terminal) into ma.
- the pulse signal wave output from the driver 31 reaches the HPF 32 via a line including 8a and the ground.
- the frequency components above f pass through the HPF 32 and f!
- the frequency components below are ISJed by HPF32.
- the frequency component passing through the HPF 32 reaches the LPF 33 via a line including the line 38b and Durand.
- those at or above f 2 are subjected to Plh by the LPF 33, and the frequency components below f 2 pass through the LPF 33.
- the frequency component that has passed through the LPF 33 reaches the receiver 34 via the line 38c and the ground, enters the gate terminal, and drives the receiver 34. Shown in (d) In Suyo, only frequency components below than f 2 f of the pulse signal wave driver 31 is output to reach the receiver 34.
- the present invention can be applied to a BPF circuit. If the cutoff frequency of the HPF is higher than the cutoff frequency of the LPF, all frequency components will be ISJhed by the HPF and LPF, and the frequency component reaching the receiver will not exist. However, the cut-off frequency of the HP F needs to be lower than the cut-off frequency of the LP F.
- a force S obtained by forming a BPF circuit using an LPF having the same configuration as the LPF circuit of the second embodiment and an HPF having the same configuration as the HPF circuit of the fourth embodiment can be applied to a BPF circuit by combining an LPF and an HPF having the same configuration as the embodiment.
- the BPF circuit according to the present embodiment is a broadband circuit that can be easily designed without performing any visual calculation and without relying on the cut-and-try method.
- the number of design parameters is small, it is possible to enhance stability of circuit characteristics and reliability.
- FIG. 25 shows the configuration of a band elimination filter circuit (BEF circuit) to which the present invention is applied.
- This BEF circuit includes a driver 31, an HPF 32, an LPF 33, and a receiver 34, similarly to the BPF circuit of the seventh embodiment.
- the individual configurations of the driver 31, the HPF 32, the LPF 33, and the receiver 34 are the same as those in the seventh embodiment.
- the BEF circuit according to the present embodiment differs in the connection of each part, and includes the driver 31 and the receiver 34. And HPF 32 and LPF 33 are inserted in parallel.
- the loose signal wave reaches LPF 33 via a line including »38b and ground.
- the frequency component of f 4 or more is PlJLh by the LPF 33, and the frequency component of less than f 4 passes through the LPF 33.
- the frequency component that has passed through the HPF 32 and the LPF 33 reaches the receiver 34 via a line including the fiber 38c or 38d and the ground, enters the gate terminal, and causes the receiver 34 to operate.
- (D) the only f 3 or more frequency components and f 4 less than the frequency component of the pulse signal Goha the driver 31 is output to reach the receiver 34.
- the present invention can be applied to a BEF circuit. If the cutoff frequency of the HPF is lower than the power cutoff frequency of the LPF, all the frequency components pass through the HPF and the LPF, so that the cutoff frequency of the HPF is changed to the cutoff frequency of the LPF. Need to be higher.
- a BEF circuit is formed using an LPF having the same configuration as the LPF circuit of the second embodiment and an HPF having the same configuration as the HPF circuit of the fourth embodiment.1 Similar to other embodiments.
- the present invention can also be applied to a BEF circuit by combining the LPF and the HPF having the configurations described above.
- the BEF circuit according to the present embodiment is a broadband circuit that can be easily designed without performing naive calculations and without relying on the cut-and-try method.
- the stability and reliability of circuit characteristics can be improved.
- Figure 27 shows the present invention.
- 3 shows a configuration of an applied high-frequency termination circuit.
- This circuit is a pull-down type termination circuit in which a signal circuit is connected to ground via a termination resistor.
- the high-frequency termination circuit includes a driver 41, an LILC 42, a resistor 43, a receiver 45, and an LILC 46.
- the dry loop 41 is the same as the driver 11 of the first embodiment, and outputs a signal electromagnetic wave from an output terminal.
- the LILC 42 is a four-terminal line structure element, and the characteristic impedance Z 0 is extremely small compared to the characteristic impedance Z 4 of the driver S-line 48 a connecting the driver 41 and the LILC 42 (Z 0 / Z 40) Is set.
- the terminal 42a of the LILC 42 is connected to the output terminal of the driver 41, and the terminal 42b is connected to the input terminal of the receiver 45.
- the terminal 42c is connected to the land through a resistor 43.
- the resistor 43 is connected to the LILC 42.
- the receiver 45 is a transistor that converts a signal input to an input terminal (gate terminal) into a voltage.
- the LI LC46 suppresses fluctuations in the DC miEVdc supplied from a power source (not shown). This is an element that keeps the terminating resistance to a constant value as viewed from the loose signal wave.
- Fig. 28 shows a state where LI LC42 is arranged in a rooster pattern on a printed circuit board.
- the terminal 42a is connected to the pattern 40a connected to the output terminal of the driver 41.
- the terminal 42b is connected to the rooster am pattern 40b connected to the good terminal of the receiver 45.
- the operation of the high-frequency termination circuit in which the terminal 42c is connected to the stranded wire pattern 40c connected to the ground via the coil 43 and the terminal 42d is open, will be described. This shows the state in which the Luth signal wave transmitted through the high-frequency termination circuit is output by the 41.
- the Norse signal wave output from the driver 41 is composed of Rooster 2 ⁇ 48a, Durand
- the electromagnetic wave component (high-frequency signal 4a) of the lus signal wave which has a high frequency and can be regarded as a line, reaches the LILC 42 via a line including Mismatch between impedance of line 48a and impedance of LI LC42 Affected by
- the high-frequency signal cannot enter the inside of the LILC 42.
- the terminal 42 c is connected to the terminating resistor (resistor 43)
- the high-frequency signal is emitted from the pair of conductors of the ILC 42 as shown in FIG.
- the signal propagates to the receiver 45 via a line including one end to which the resistor 43 is connected (a conductor having the terminal 42c and the terminal 42d) and the ground.
- High-frequency signal propagating to the receiver 4 5 side enters the gate terminal of the receiver 4 5 via a line including a Tori ⁇ 4 8 b and the ground.
- the low-frequency electromagnetic wave component (low-frequency signal) of the signal wave that has reached the LILC 42 is not affected by the mismatch between the impedance of the line 48 a and the impedance of the LILC 42. Since it can enter the inside of the LILC 42, it propagates through the dielectric part of the LILC 42 to the receiver 45 side, and the gate terminal of the receiver 45 through a line including the fiber 48b and the ground. to go into.
- the DC signal passes through the conductor of the LILC 42 to the receiver 45 side, and enters the gate terminal of the receiver 45 via the wiring 48b.
- a signal electromagnetic wave is a force that reciprocates between a Hi level and a Low level.
- a state in which the signal stops at the Hi level level and a Low level is maintained for a long time.
- DC current may continue to flow. In such a case, if DC current flows through the terminating resistor, power will be consumed while the signal is being output.
- the line length of the transmission line is shorter than the 1Z4 wavelength of the lowest frequency electromagnetic wave that can ignore the voltage fluctuation of the capacitor, 3 ⁇ 4 ⁇ Electricity and DC current can be prevented from flowing through the terminating resistor.
- the length of the transmission line on the printed circuit board is usually shorter than this, matching termination is not possible, and electromagnetic waves and DC current of frequency components do not flow through the termination resistor.
- the termination circuit is configured using capacitors, and in the high frequency band, the waveform of the signal wave is distorted.
- the impedance of the LI LC does not increase even in the high-frequency band, if the termination circuit is formed using the LI LC as in the high-frequency termination circuit according to the present embodiment, the electromagnetic wave in the wide frequency band including the high-frequency signal will have a waveform. Matching termination can be performed without causing distortion.
- the LILC acts in the same way as a capacitor, so matching termination is possible as in the case where a terminating resistor is connected via a capacitor.
- the terminating resistor is a DC current The DC current does not flow through the terminating resistor because it is connected to the separated conductor.
- the termination resistor is connected to the terminal of the LILC exhibiting the impedance equal to or less than the predetermined value over a wide frequency band, and thereby, all the pulse signals are output. Since the frequency components are matched and terminated, some of the frequency components are not terminated and ringing is generated, thereby preventing the receiver from being lifted. Also, since the terminating resistor is insulated from the driver in terms of DC current, even if the driver continues to output Hi or Low signals, no direct current flows through the terminating resistor and power is supplied. Don't waste it.
- FIG. 30 shows the configuration of a high-frequency termination circuit to which the present invention is applied.
- This circuit is a pull-down type termination circuit in which the signal circuit is connected to the land through a terminal resistance as in the ninth embodiment, and the terminal 42c is opened, and the terminal 42d is connected to the resistor 44d.
- This is the same as the ninth embodiment except that the ninth embodiment is connected to the ground via a.
- the impedance of the resistor 44 is equal to the impedance of the conductor 48 b connecting the LILC 42 and the receiver 45.
- Fig. 31 shows a state in which LILC42 is arranged on the rooster 2; line pattern on the printed circuit board.
- the terminal 42a is connected to the rooster B / wire pattern 40a connected to the output terminal of the driver 41.
- the terminal 42b is connected to the iam pattern 40b connected to the gate terminal of the receiver 45.
- the terminal 42c is open, and the terminal 42d is connected to the pattern 40d connected to the ground via the coil 44.
- the operation of the high-frequency termination circuit will be described.
- the state in which the noise signal wave output from the driver 41 is transmitted through the high-frequency termination circuit is the same as in the ninth embodiment. Since the resistor 44 is connected to the terminal 42 d of the LILC 42, High frequency signals also enter the gate terminal of the receiver 45. As a result, all frequency components of the pulse signal wave output from the driver 41 are input to the gate terminal of the receiver 45, and the pulse signal wave generated by the driver 41 is faithfully reproduced in the receiver 45. You.
- the high-frequency termination circuit has a wide A terminating resistor is connected to the terminal of the LILC which shows an impedance of a predetermined value or less over the frequency band. Since all the frequency components of the pulse signal are matched and terminated, some of the frequency components are not terminated and ringing is generated, preventing the receiver from being damaged. In addition, since the terminating resistor is insulated from the driver in terms of DC current, even if the driver continues to output Hi or ow signals, no DC current flows through the terminating resistor and power is wasted. Do not consume.
- FIG. 32 shows the configuration of a high-frequency termination circuit to which the present invention is applied.
- This circuit is a pull-down type termination circuit in which a signal circuit is connected to a duland via a termination resistor, as in the ninth embodiment, and the terminal 42 d is connected to the duland via a resistance 44. Is the same as in the ninth embodiment.
- the impedance of resistor 44 is equal to the impedance of 8b connecting LILC 42 and receiver 45.
- Figure 33 shows a state where LILC 42 is arranged in an IS ⁇ pattern on a printed circuit board.
- the terminal 42 a is connected to the pattern 40 a connected to the output terminal of the driver 41.
- the terminal 42b is connected to a pattern 40b connected to the gate terminal of the receiver 45.
- Terminal 42c is connected to the 15 ⁇ pattern 40c connected to ground via resistor 43, and terminal 42d is connected to the rooster pattern 40d connected to ground via resistor 44. ing.
- the operation of the high-frequency termination circuit according to the present embodiment is almost the same as that of the ninth embodiment and the tenth embodiment, except that a terminating resistor is connected to both the entrance side and the exit side of the LILC 42. Because the driver 4 1 outputs. Luz electromagnetic waves can be more reliably terminated.
- FIG. 34 shows the configuration of a high-frequency termination circuit to which the present invention is applied.
- This circuit is a bull-up type termination circuit in which a signal circuit is connected to a power source via a termination resistor.
- the high-frequency termination circuit according to the present embodiment includes a driver 51, a LI LC 52, a resistor 53, a receiver 55, a LI LC 56, and a LI LC 57.
- the driver 51 is the same as the driver 51 of the first embodiment, and outputs a signal electromagnetic wave from an output terminal.
- the LILC 52 is a four-terminal line structure element in which a pair of conductors face each other with a dielectric interposed therebetween.
- the characteristic impedance Z 0 is the characteristic impedance of the S / wire 58 a connecting the driver 51 and the LILC 52. Very small compared to Z5 (Z0 / Z5 ⁇ 0).
- the LI LC 52 includes all frequency components of the pulsed electromagnetic wave output from the driver 51 in the target frequency band.
- the terminal 52a of the LILC 52 is connected to the terminal 56b of the LILC 56 via a resistor 53, respectively.
- the terminal 52b is open.
- the terminal 52c is connected to the output terminal of the driver 51, and the terminal 52d is connected to the gate terminal of the receiver 55.
- the resistor 53 is a resistor (terminating resistor) for terminating the pulse signal wave so as not to be reflected at the LILC 52, and its impedance is equal to the impedance of the cock 2 ⁇ 58a connecting the driver 51 and the ILC 52.
- the receiver 55 is an element for converting a signal input to the gate terminal into a voltage.
- the LI LCs 56 and 57 are elements that suppress the fluctuation of the DC ffiVdc supplied from a power source (not shown) and make the terminating resistance as seen from the pulse signal wave constant.
- FIG. 35 shows a state in which the LILC52 is arranged in a rooster dm pattern on a printed circuit board.
- the terminal 52a is connected to the rooster pattern 50a connected to the terminal 56b of the LILC 56 via the resistor 53, and the terminal 42b is open.
- Terminal 52. Is connected to the fiber pattern 50c connected to the output terminal of the driver 51.
- the terminal 52d is connected to a stranded wire pattern 50d connected to the gut terminal of the receiver 55.
- a termination resistor 53 connected to the LILC 52 is connected to a terminal 56b of the LILC 56, and a terminal 56d facing the terminal 56b is connected to the terminal. Since L I LC 56 has a low impedance, the resistor 53 can be regarded as being connected to the ground at high frequencies.
- FIG. 36 shows a state where the noise signal wave output from the driver 51 is transmitted through the high-frequency termination circuit.
- Output from the 5 1 The Luth signal wave reaches the LILC 52 via a line including the line 58a and the ground.
- the frequency is high and the LILC 52 is regarded as a line.
- the electromagnetic wave component (high-frequency signal 5 a) that is generated is affected by the mismatch between the impedance of the vertical line 58 a and the impedance of the LILC 52.
- the high-frequency signal is LILC
- the terminal 52a is connected to the terminating resistor (resistor 53), so that the high-frequency signal cannot be transmitted as shown in (b).
- the signal propagates to the receiver 55 side through a line including the ground and a conductor that is considered to be connected to the ground via the resistor 53 among the pair of conductors of the LILC 52.
- the high-frequency signal 5a that has propagated to the receiver 55 enters the gut terminal of the receiver 55 via a line including the conductor 58b and the ground.
- the low frequency electromagnetic wave component (low frequency signal) of the noise signal wave that has reached LILC 52 is affected by the mismatch between the impedance of Tori Fiber 58a and the impedance of LILC 52.
- the LILC 52 can enter the receiver 55 through the dielectric part of the LILC 52 as shown in (b).
- the signal enters the gate terminal of the receiver 55 via a line including the conductor 58b and the ground.
- the DC signal passes through one of the pair of conductors of the LILC 52 to which the resistor 53 is not connected (a conductor having the terminal 52 a and the terminal 52 b) and is transmitted to the receiver 55 side. Therefore, all the frequency components of the pulse signal wave output from the driver 51 are input to the good terminal of the receiver 55, so that the driver 5 1
- the waveform of the panelless signal wave generated by the receiver 55 is faithfully reproduced in the input signal to the gate terminal of the receiver 55. Therefore, the receiver 55 performs f3 ⁇ 4I on the basis of a signal wave having the same waveform as the pulse signal applied by the dry cell 51.
- a termination resistor is connected to a terminal of the LILC that exhibits an impedance of a predetermined value or less over a wide frequency band. Since all frequency components of the noise signal are matched and terminated, some frequency components are not terminated and ringing occurs, It will not be made to let you go. In addition, since the terminating resistor is insulated from the driver in terms of DC current, even if the driver continues to output Hi or Low signals, no DC current flows through the terminating resistor and power is wasted. Do not consume it.
- FIG. 37 shows the configuration of a high-frequency termination circuit to which the present invention is applied.
- This circuit is a pull-up type termination circuit in which the signal circuit is connected to the power source via a termination resistor.
- Terminal 52a is open, and terminal 52b is connected to terminal LILC 56 via resistor 54.
- the impedance of the resistor 54 is equal to the impedance of the rooster 58 b connecting the LILC 54 and the receiver 55.
- FIG. 38 shows a state in which LILC 42 is arranged in a wiring pattern on a printed circuit board.
- the terminal 52 a is open, and the terminal 52 b is connected to the rooster pattern 50 b connected to the terminal 56 b of the LILC 56 via the resistor 54.
- the terminal 52c is connected to the fiber pattern 50c which is connected to the output terminal of the dry fiber 51.
- the terminal 52 d is connected to the wire pattern 50 d connected to the gate terminal of the receiver 5-5.
- the termination resistor 54 connected to the LILC 52 is connected to the terminal 56 b of the LILC 56, and the terminal 56 d opposite to the terminal 56 b is connected to the ground. ing. Because L I L C 56 has low impedance, resistor 54 can be considered to be connected to Durand.
- the high-frequency termination circuit The operation of the high-frequency termination circuit will be described.
- the state in which the pulse signal wave output from the driver 51 is transmitted through the high-frequency termination circuit is the same as in the first and second embodiments, and all the frequency components of the pulse signal wave output from the driver 51 are converted to the receiver 51 Input to the gate terminal of the device.
- the waveform of the loose signal wave is faithfully reproduced in the input signal at the gate terminal of the receiver 55. Therefore, the receiver 55 outputs the output of the driver 51. It operates based on the signal waveform of the same waveform as the pulse signal.
- the termination resistor is connected to the terminal of the LILC that exhibits an impedance of a predetermined value or less over a wide frequency band.
- the resistance Since the resistance is connected, all frequency components of the pulse signal are matched and terminated, so that ringing is generated without terminating some of the frequency components, thereby preventing the receiver from moving up.
- the terminating resistor is insulated from the driver in terms of DC current, even if the driver continues to output Hi or Low signals, no DC current flows through the terminating resistor and power is wasted. Do not consume.
- FIG. 39 shows the configuration of a high-frequency termination circuit to which the present invention is applied.
- This circuit is a bull-up type termination circuit in which a signal circuit is connected to a power source via a termination resistor, and the first and second embodiments are implemented except that the terminal 52b is connected to ground via a resistor 54.
- the impedance of the resistor 54 is equal to the impedance of the rooster B / wire 58b connecting the LILC 54 and the receiver 55.
- FIG. 40 shows a state where LILC 52 is arranged in a ⁇ ⁇ pattern on a printed circuit board.
- the terminal 52 a is connected to the wiring pattern 50 a connected to the terminal 56 b of the LILC 56 via the coil 53.
- the terminal 52 b is connected to the pattern 50 b connected to the terminal 56 b of the LILC 56 via the coil 54.
- the terminal 52c is connected to the rooster pattern 50c connected to the output terminal of the driver 51.
- the terminal 52d is connected to the S / line pattern 50d connected to the gate terminal of the receiver 55.
- the operation of the high-frequency termination circuit according to this embodiment is almost the same as that of the first and second embodiments and the first and third embodiments, except that a termination resistor is connected to both the entrance and exit sides of the LILC 52. Therefore, the pulsed electromagnetic wave output from the driver 51 can be more reliably terminated.
- the LPF circuit and the HPF circuit have been described by taking the primary configuration as an example, but the present invention can be applied to a higher-order LPF circuit or an HPF circuit.
- the connection is described as an example, but a Thevenin connection may be made by connecting a terminating resistor to both the power supply and the ground.
- driver the receiver, and the like are not limited to the configurations described in the above embodiments.
- a wideband circuit that can obtain desired circuit characteristics over a wide frequency band can be configured with a small number of circuit elements.
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US10/551,413 US7282963B2 (en) | 2003-04-04 | 2004-03-24 | Wide-band circuit coupled through a transmission line |
JP2005505192A JPWO2004091035A1 (ja) | 2003-04-04 | 2004-03-24 | 広帯域回路 |
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JP (1) | JPWO2004091035A1 (ja) |
KR (1) | KR100824252B1 (ja) |
CN (1) | CN1792002A (ja) |
WO (1) | WO2004091035A1 (ja) |
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KR101632199B1 (ko) * | 2014-06-30 | 2016-06-21 | 주식회사 이너트론 | 광대역 저잡음 증폭 회로 |
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JPS62239702A (ja) * | 1986-04-09 | 1987-10-20 | コム・デブ・リミテツド | モジユラ隣接チヤンネル・マルチプレクサ |
JPH0444702U (ja) * | 1990-08-22 | 1992-04-16 | ||
JPH0546724B2 (ja) * | 1984-08-08 | 1993-07-14 | Nippon Denso Co | |
JP2501994B2 (ja) * | 1992-03-13 | 1996-05-29 | 日本電信電話株式会社 | 電力増幅器 |
JPH08316870A (ja) * | 1995-04-07 | 1996-11-29 | Lk Prod Oy | 無線通信送受信装置 |
JP2000059167A (ja) * | 1998-08-11 | 2000-02-25 | Em Techno:Kk | ラインフィルタ装置 |
JP2001015885A (ja) * | 1999-07-02 | 2001-01-19 | Murata Mfg Co Ltd | 高周波用電子回路及び高周波用電子回路へのチップ三端子コンデンサの実装構造 |
JP2001177305A (ja) * | 1999-12-16 | 2001-06-29 | Nec Corp | ローパスフィルタ |
JP2002009507A (ja) * | 2000-06-19 | 2002-01-11 | Nippon Dengyo Kosaku Co Ltd | 多周波分波器 |
JP2002026603A (ja) * | 2000-07-07 | 2002-01-25 | Mitsubishi Electric Corp | バンドパスフィルタ |
JP2002217603A (ja) * | 2001-01-12 | 2002-08-02 | Mitsubishi Electric Corp | 高周波回路 |
JP2002252330A (ja) * | 2001-02-23 | 2002-09-06 | Mitsubishi Electric Corp | 高周波直列容量素子およびこれを用いた高域通過フィルタ |
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DE3580070D1 (de) | 1984-07-16 | 1990-11-15 | Nippon Denso Co | Hf-filter fuer elektronische instrumente. |
KR100285018B1 (ko) * | 1993-08-27 | 2001-03-15 | 무라따 미치히로 | 고주파 전자계 결합형 박막 적층 전극 |
-
2004
- 2004-03-24 JP JP2005505192A patent/JPWO2004091035A1/ja not_active Withdrawn
- 2004-03-24 US US10/551,413 patent/US7282963B2/en not_active Expired - Fee Related
- 2004-03-24 WO PCT/JP2004/004089 patent/WO2004091035A1/ja active Application Filing
- 2004-03-24 KR KR1020057018937A patent/KR100824252B1/ko not_active IP Right Cessation
- 2004-03-24 CN CNA2004800138548A patent/CN1792002A/zh active Pending
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JPH0546724B2 (ja) * | 1984-08-08 | 1993-07-14 | Nippon Denso Co | |
JPS62239702A (ja) * | 1986-04-09 | 1987-10-20 | コム・デブ・リミテツド | モジユラ隣接チヤンネル・マルチプレクサ |
JPH0444702U (ja) * | 1990-08-22 | 1992-04-16 | ||
JP2501994B2 (ja) * | 1992-03-13 | 1996-05-29 | 日本電信電話株式会社 | 電力増幅器 |
JPH08316870A (ja) * | 1995-04-07 | 1996-11-29 | Lk Prod Oy | 無線通信送受信装置 |
JP2000059167A (ja) * | 1998-08-11 | 2000-02-25 | Em Techno:Kk | ラインフィルタ装置 |
JP2001015885A (ja) * | 1999-07-02 | 2001-01-19 | Murata Mfg Co Ltd | 高周波用電子回路及び高周波用電子回路へのチップ三端子コンデンサの実装構造 |
JP2001177305A (ja) * | 1999-12-16 | 2001-06-29 | Nec Corp | ローパスフィルタ |
JP2002009507A (ja) * | 2000-06-19 | 2002-01-11 | Nippon Dengyo Kosaku Co Ltd | 多周波分波器 |
JP2002026603A (ja) * | 2000-07-07 | 2002-01-25 | Mitsubishi Electric Corp | バンドパスフィルタ |
JP2002217603A (ja) * | 2001-01-12 | 2002-08-02 | Mitsubishi Electric Corp | 高周波回路 |
JP2002252330A (ja) * | 2001-02-23 | 2002-09-06 | Mitsubishi Electric Corp | 高周波直列容量素子およびこれを用いた高域通過フィルタ |
Also Published As
Publication number | Publication date |
---|---|
US20070024323A1 (en) | 2007-02-01 |
KR100824252B1 (ko) | 2008-04-24 |
JPWO2004091035A1 (ja) | 2006-07-06 |
US7282963B2 (en) | 2007-10-16 |
KR20060002937A (ko) | 2006-01-09 |
CN1792002A (zh) | 2006-06-21 |
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