Unlock instant, AI-driven research and patent intelligence for your innovation.

Integrated circuit for high frequency device

An integrated circuit, high-frequency technology, applied in the adjustment of the resonant circuit, parts of the resonant circuit, electrical components, etc., can solve the problems that the influence of the intermediate frequency filter cannot be completely eliminated, adjustment errors, etc., to achieve the effect of reducing the influence.

Inactive Publication Date: 2004-06-16
PANASONIC CORP
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, according to the above-mentioned structure, the influence of the intermediate frequency filter 7 cannot be completely eliminated, because the length of the contactor plug 17 and the drop resistor 16 are changed, so that the contact resistance of the contactor plug 17 changes.
Therefore, an adjustment error of the band-pass filter 2 as a high-frequency filter is caused

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Integrated circuit for high frequency device
  • Integrated circuit for high frequency device
  • Integrated circuit for high frequency device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] exist figure 1Among them, the high-frequency device of the present invention includes: an input terminal 21; A bandpass filter 22 (used as an example of a high-frequency filter) connected to the input terminal 21; a mixer 24, an input terminal of which Be connected with the output end of band-pass filter 22, and its other input end is connected with the output end of local oscillator 23; An intermediate frequency filter 25 that is connected with the output end of mixer 24; One is connected with the output of intermediate frequency filter 25 An intermediate frequency amplifier 26 connected to the terminal; an output terminal 27 connected with the output terminal of the intermediate frequency amplifier 26; a PLL circuit 28 connected with the local oscillator 23 loop; a data input terminal 29 connected with the PLL circuit 28; An electronic switch 30 near the intermediate frequency filter 25 and connected across both ends of the intermediate frequency filter; and a contro...

Embodiment 2

[0038] Fig. 2 is a block diagram showing a circuit of a high frequency device according to a second embodiment of the present invention. As shown in Figure 2, the high-frequency device of the second embodiment includes: an input terminal 51 of an input high-frequency signal; a broadband bandpass filter 52 connected with the input terminal 51; A high-frequency amplifier 53 connected; a narrow-band bandpass filter 54 connected with the output of the high-frequency amplifier 53; an unbalanced-balun 55 connected with the output of the narrowband band-pass filter 54; a balanced frequency mixer device 58, one of its input ends is connected with the output end of unbalanced-balun converter 55, and its other input end is connected with the output end of local oscillator 56 through buffer 57; An intermediate frequency filter 59 between terminals; a balun 60 connected to the intermediate frequency filter 59; an output terminal 61 connected to the balun 60 output; a known PLL circuit con...

Embodiment 3

[0045] Fig. 5 shows a high frequency device according to a third embodiment of the present invention. The difference between the second embodiment and the third embodiment lies in that the first integrated circuit 67 and the second integrated circuit 68 used in the second embodiment are integrated into one integrated circuit 80 . Therefore, since the signal as the control signal supplied to the electronic switch 65 can be taken from the data control terminal 63, it is not necessary to provide the control terminal 66 of the electronic switch 65 in the integrated circuit 80. In addition, since the control of the electronic switch 65 can be operated by the signal taken from the data control terminal 63, the detection contact by the contactor plug can be omitted. Therefore, bad contact caused by the contactor plug can be eliminated. In addition, since the contactor plug can be omitted, the size of the test stand can be reduced and low cost can be achieved.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The device has an input terminal, a high frequency filter that receives a signal fed to the input terminal, a mixer that receives an output signal from the high frequency filter at its one input and receives an output signal from a local oscillator at the other input, an intermediate frequency filter that receives an output signal from the mixer, and an input terminal that receives an output signal of the intermediate frequency filter. The device is also provided with an electronic switch that is placed in the vicinity of the intermediate frequency filter and makes a pass characteristic of the intermediate frequency filter flat by closing the switch and the opening / closing of the electronic switch is controlled externally. Thus, an adjustment error of the high frequency filter is reduced.

Description

[0001] This application is a divisional application of an invention application with a filing date of September 12, 1998, an application number of 98120330.2, and an invention title of "high frequency device". technical field [0002] The invention relates to an integrated circuit for high frequency devices. Background technique [0003] Conventional high frequency devices will be described below. As shown in Figure 8, the traditional high-frequency device is constituted like this, and it comprises: an input end 1 of input high-frequency signal; A band-pass filter 2 that is connected to input end 1; One is connected to the band-pass filter 2 An unbalanced-balanced converter 3 of an output end; a balanced mixer 6, one input end of which is connected with the output end of the unbalanced / balanced converter 3, and its other input end is connected with the voltage-controlled oscillator through the buffer 5 The output terminal of 4 is connected; one is connected to the intermedi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H03J7/18H03D7/00H03J1/00H04B1/10H04B1/16H04B1/26
CPCH03D2200/009H03D2200/0017H03D7/00H04B1/1036
Inventor 香田勉三岛昭尾崎哲也松下诚二
Owner PANASONIC CORP