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

Signal level switching circuit

A technology for switching circuits and signal levels. It is used in electrical components, baseband systems, and shaping networks in transmitters/receivers. It can solve problems such as circuit characteristic deterioration, cost increase, and circuit complexity.

Inactive Publication Date: 2006-04-12
HONDA ELECTRONICS CO LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] (1). The cost increase due to the arrangement of the attenuation circuit 42 and the amplification circuit 45
[0014] (2). Due to the complexity of the circuit brought by the attenuation circuit 42 and the amplifier circuit 45
[0015] (3). The deterioration of the characteristics due to the complexity of the circuit

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
  • Signal level switching circuit
  • Signal level switching circuit
  • Signal level switching circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] in figure 2 Among them, 11a, 11b represent input terminals, 12a, 12b represent input resistances, 13 represents a switching circuit, s0, s1, ... sn represent switching contacts formed by switching elements such as transistors, and 14 1 ~14 n Represents a voltage divider resistor, 15a, 15b represent output terminals, 16 represents a receiving circuit, 17 represents a communication transformer, 18a, 18b represents a buffer circuit, and 19 represents a receiving level judgment circuit.

[0031] The primary winding of the signal transformer 17 is connected to the input terminals 11a, 11b connected to various transmission paths, and the input resistors 12a, 12b are connected to the secondary winding of the signal transformer 17, which is switched and controlled by the control signal from the receiving circuit 16. The signal passing through the input resistors 12a and 12b is directly input to the receiving circuit 16 through the switch circuit 13, or a voltage divider resistor 1...

Embodiment 2

[0039] in image 3 neutralize figure 2 The same symbol indicates the same part, 14 0 Represents the voltage divider resistance. That is, the switching contact s0 of the switching circuit 13 is not opened, and the voltage dividing resistor 14 is connected. 0 . The resistance value at this time can have, for example, 14 0 >14 1 >14 2 >14 3 >…>14 n Relationship. At this time, if the voltage divider resistor 14 0 The resistance value of is infinite, and figure 2 The open state in is equivalent.

[0040] (Possibility of industrial application)

[0041] As explained above, the present invention is composed of input resistors 2a, 2b and a plurality of switching elements connected between input terminals 1a, 1b and output terminals 5a, 5b of receiving circuit 16, including and output terminals 5a, The switch circuit 3 connected to 5b and the voltage divider resistor 4 through which the input resistors 2a and 2b are selectively switched are connected. By controlling the switching circuit ...

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

A signal level switching circuit is disclosed which comprises input resistors (2a, 2b) connected between signal input terminals (1a, 1b) and output terminals (5a, 5b) for connection with a receiving circuit (6), a switching circuit (3) which is composed of a plurality of switching devices and connected with the output terminals (5a, 5b), and a partial pressure resistor (4) which selectively switches connections to the input resistors (2a, 2b) using the switching circuit (3).

Description

Technical field [0001] The present invention relates to a signal level switching circuit that switches the signal level input to a receiving circuit within a predetermined range. Background technique [0002] In a receiving circuit that receives and processes signals such as data and sound, the signal level needs to be within the range where signal processing is possible. Or, the level of the signal transmitted via the transmission path becomes different due to the configuration of the transmission path, the transmission state, and the like. Therefore, in the front stage of the receiving circuit that receives and processes the signal transmitted through the transmission path, it is generally set to attenuate when the signal level is high, and to amplify when the signal level is low, and to control the signal level within the specified range. installation. [0003] Figure 4 It is a diagram showing the main part of a conventional signal level switching circuit provided in the fro...

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): H04L25/03H04B1/18H04L25/02
CPCH04L25/0292H04L25/0278
Inventor 东条敏郎加来尚小川透
Owner HONDA ELECTRONICS CO LTD