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Suppression circuit of high speed high frequency operation

A high-speed high-frequency, line technology, applied in the direction of improving amplifiers to reduce noise effects, etc., can solve problems such as unsuitable for high-frequency operations

Inactive Publication Date: 2004-09-29
SILICON INTEGRATED SYSTEMS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are not suitable for high-frequency operation due to gain decay at high frequencies.

Method used

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  • Suppression circuit of high speed high frequency operation
  • Suppression circuit of high speed high frequency operation
  • Suppression circuit of high speed high frequency operation

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Experimental program
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Embodiment Construction

[0017] Such as image 3 Shown is a schematic block diagram illustrating the suppression circuit of the present invention. The suppression circuit includes a suppression input unit 301, a low-amplitude preamplifier 302, a sampling and decision logic circuit 303, etc., the suppression input unit 301 processes the input signal in advance to generate a reference voltage level value, and the low-amplitude preamplifier 302 amplifies the pre-processed signal, and the sampling and decision logic circuit 303 selects samples for the signal, and uses a logic circuit to determine the state of the signal.

[0018] Such as Figure 4 Shown is the circuit of the suppression input unit 301 of the present invention. The circuit includes a pair of input circuits, and each input circuit includes a current source 401 , a resistor 402 and a transistor 403 connected in series. The input signals D and DB are pre-processed to generate four different voltages: D+, D-, SQ+ and SQ-, where the voltage ...

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PUM

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Abstract

This invention relates to a suppressing circuit acted on high speed and high frequency including a suppressing input unit, a low amplitude preamplifier and a sampling and judging circuit, among which, the suppressing input unit preprocesses the positive / negative phase signals of an input signal to generate four signals in pairs to the said low amplitude preamplifier which output expands sampling via the said sampling and judging circuit to be controlled by a multiphase clock. A logic circuit decides the state of this input signal according to multiple sample books.

Description

technical field [0001] The present invention relates to the field of high-frequency devices, and more particularly to a method for squelching noise in electronic devices that need to operate at high speed and high frequency. Background technique [0002] A suppression circuit is used in the high-frequency device to avoid unnecessary hissing sound caused by meaningless signals such as noise being mistaken for meaningful signals when there is no real signal input. Through the suppression circuit, the input signal must exceed a certain level to be accepted as a meaningful signal. The common suppression circuit usually compares the input signal, amplifies it to full amplitude, and directly determines the input signal by checking the output Does it make sense. Such as figure 1 Shown is a conventional rejection procedure, the rejection input operation identifies the normal and inverse phase of the input signal, while the full amplitude rejection operation compares these signals ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/26
Inventor 吴璟琳刘先凤刘鸿志
Owner SILICON INTEGRATED SYSTEMS