ch15 基本放大电路

Page 1/6Electronics & SoftwareMultichannel Amplifierfor the Injection Molding Industry5155A _000-403e -03.09©2009, Kistler Group, Eulachstrasse 22, 8408 Winterthur, Switzerland This information corresponds to the current state of knowledge. Kistler reserves the right to make technical changes. Liability for consequential damage resulting Type 5155A...The purpose of the multichannel charge amplifier Type 5155A… with 1, 2 or 4 channels is to convert the charge signal from piezoelectric sensors or the signal from thermocouples into a proportional voltage signal. This amplifier has beend eveloped for industrial applications, primarily for injection molding machines.• Charge amplifier with 2 measuring ranges • Charge and thermocouple amplifier• Self-optimizing switch-over output (SmartAmp-Option)• Industrial case with IP65 protectionDescriptionThe multichannel charge amplifier Type 5155A... is provided with one, two or four charge amplifier modules (indicated in the circuit diagram as MLV). The two measuring ranges of the charge amplifier inputs can be switched over for each chan-nel individually by remote control. Amplifiers equipped with temperature inputs are provided with 1 charge amplifier and 1 temperature amplifier or 2 charge amplifiers and 2 tem-perature amplifiers. All charge amplifier modules contain at the input a capacitive negative feedback amplifier in hybrid design with an extremely high insulation resistance.In thermoplastic injection molding, the SmartAmp option "self-optimizing switch-over detection" automatically d etects volumetric filling of the mold, and in each cycle sends a con-trol signal to the injection molding machine. The mold must be equipped with a directly measuring cavity pressure sensor close to the gate.ApplicationThe multichannel charge amplifier Type 5155A… is intended for use with all types of piezoelectric sensors and Type K ther-mocouples. The output signals can be used to monitor, control and optimize the injection molding process.The SmartAmp option "self-optimizing switch-over detec-tion" can be e asily integrated in machine control systems. Forr etrofitting, the injection molding machine must be prepared by the m achine manufacturer. This option considerably reduce the setting-up time, since the switching point is automatically preset by means of the charge amplifier without the need of manual optimization. D uring production, the option auto-matically compensate process fluctuations, thereby producing moldings of greater uniformity.Photo of version with2-channel charge amplifier (TNC) +2-channel thermocouple amplifierPage 2/65155A _000-403e -03.09©2009, Kistler Group, Eulachstrasse 22, 8408 Winterthur, SwitzerlandTel.+41522241111,Fax+41522241414,****************, This information corresponds to the current state of knowledge. Kistler reserves the right to make technical changes. Liability for consequential damage resulting Technical DataCharge Amplifier Number of channels1, 2 or 4Measuring range I pC min. ±5 000pC max. ±50 000adjusted toType 5155A1xxx pC ±50 000 Type 5155A2xxx pC ±20 000Type 5155A3xxx pC customer optionMeasuring range ratios Range I/Range II Type 5155Ax1xx 10 Type 5155Ax2xx 4 Type 5155Ax3xx2DriftpC/s <±0,05Reset-Operate transient pC <±2Maximum voltage between V<±4sensor GND and output/ supply GNDInterference signal rejection dB >50between sensor GND and output/supply GND (0 ... 0,3 kHz) Maximum input signal:Voltage (continuous) V ±10 ChargepC ±150 000Voltage Output Error % <1Zero point error (Reset) mV <±10Output voltage V 0 ... ±10Output voltage limitation V >11Output current mA 0 ... ±5Output impedance Ω 10Output interference signal mV pp <10(0,1 Hz ... 1 MHz) Frequency response Deviation (−5 %) kHz ≈0 ... >3,5 Deviation (−3 dB) kHz ≈0 ... >10Current Output 4 ... 20 mAOption in place of voltage output. Not available for combined charge amplifier and thermocouple amplifier versions.Error % <1,3Zero point error (Reset) mA <±0,016Output current mA 4 ... 20Output current limitation mA 25Output impedance MΩ >40Maximum load resistance Ω 650Thermocouple AmplifierNoise suppression (ground loop) through differential input stage Number of channels 1 or 2Thermocouple (switchable to Type K Type J available on request) Measuring range °C 0 ... 200Output voltage V 0 ... 10Output current mA 0 ... 2Input impedance MΩ >1Output impedance Ω 10Zero point error mV <10Transmission sensitivity 1)mV/K 50Error (gain) % ±0,5Error (non-linearity) °C <1,5Output interference signal mV pp <20 (0,1 Hz ... 1 MHz) Frequency range kHz 0 ... >1Max. voltage between input V <±4 minus and output/supply GND Sensor disconnection detection V ≈-41)Calibration: 0 °C = 0 V, 100 °C = 5 V A differential input circuit ensures that common-mode signals of ±4 V between Sensor/Low and Output/Power GND, such as occur in in-dustrial environments, have no disturbing influence.Control inputs for Reset/Operate, Measuring Range II, Sensitivity,TestActuation is bipolar and electrically isolated via optocouplers. The common input of Test/Operate/Measuring range II/Sensitivity (Con-trol GND, PIN 18 of the D-Sub connector) can be connected internally either with the potential Exct 18 ... 30 VDC or Exct GND. Accordingly Test, Operate, Measuring range II and Sensitivity are actuated with negative voltage or optionally with user specified voltage.Actuation voltage Operate (logic 1) V 3 (30)Reset (logic 0)V <2 Measuring range II (logic 1) V 3 (30)Measuring range I (logic 0) V <2 Test signal (logic 1) V 3 (30)No Test signal (logic 0)V <2 Sensitivity <5 pC/bar (logic 1) V 3 (30)Sensitivity >5 pC/bar (logic 0) V <2Actuation currentmA0,6 (9)Output signal when Test and Measuring range II active Voltage outputV 8 Current output 4 ... 20 mA mA 16,8Tolerance of test signal% 5Page 3/65155A _000-403e -03.09©2009, Kistler Group, Eulachstrasse 22, 8408 Winterthur, SwitzerlandTel.+41522241111,Fax+41522241414,****************, This information corresponds to the current state of knowledge. Kistler reserves the right to make technical changes. Liability for consequential damage resulting FIX/SLThe outputs are switched via photo MOS relays.Current rating, continuous mA <100Current rating, pulse (<0,1 s) mA <300Resistance when switched onΩ <50 typical Ω 30Constant voltage V <±42Voltage between outputs and protective ground V RMS <30Power Supply Supply voltage VDC 18 (30)Current consumption per Charge amplifier channel mA ≈10 (without load and without SLP) Thermocouple channel mA ≈15(without load)Additional current consumption by SLP mA ≈35 Current output per channel mA ≈2,5(without load) Connections SensorCharge input Type TNC neg. or BNC neg. or 4-channel Fischermultipole plugThermocouple input Type FischerDBPU 102 A051female Supply, signal outputs,D-Sub Control inputsType25 pin maleGeneral DataOperating temperature range °C 0 ... 60Min./max. temperature °C −10/70Vibration resistancegp 10(20 ... 2 000 Hz, duration 16 min., cycle 2 min.)Shock resistance (1 ms)g 200Degree of protection (only with scre- IP 65 wed-on TNC connectors) DIN 40050 Housing material die castaluminiumWeightg≈400• Recommended mounting position: on perpendicular sur-face, connections downward• The case ground is connected to the output or supply ground only via an R/C network. This prevents interference due to a "floating" case.Contact Assignment D-Sub 25 Connector7 Exct 18 ... 30 VDC 8 Exct GND 9 NC 10 NC11 Common FIX/SL 12 FIX c)13 SL c)14 Signal GND 15 NC 16 NC 17 NC18 Common Control 19 Operate 20 Sensitivity c)21 Test22 Range II Ch123 Range II Ch2 a) d)24 Range II Ch3 b) d)25 Range II Ch4 b) d)a) with 1 channel version: NCb) with 1 and 2 channel version: NCc) with version without SmartAmp "self-optimizing switching-point detection": NCd) with temperature input: NCPage 4/6©2009, Kistler Group, Eulachstrasse 22, 8408 Winterthur, SwitzerlandTel.+41522241111,Fax+41522241414,****************, This information corresponds to the current state of knowledge. Kistler reserves the right to make technical changes. Liability for consequential damage resulting Block Schematic DiagramPage 5/65155A _000-403e -03.09©2009, Kistler Group, Eulachstrasse 22, 8408 Winterthur, SwitzerlandTel.+41522241111,Fax+41522241414,****************, This information corresponds to the current state of knowledge. Kistler reserves the right to make technical changes. Liability for consequential damage resultingPage 6/65155A _000-403e -03.09©2009, Kistler Group, Eulachstrasse 22, 8408 Winterthur, SwitzerlandTel.+41522241111,Fax+41522241414,****************, This information corresponds to the current state of knowledge. Kistler reserves the right to make technical changes. Liability for consequential damage resulting Optional AccessoriesArt. No./Type • 2 cheese-head screws M4 x 16 6.120.013• 2 spring washers M4 6.230.063• TNC-BNC adapter1709• Connecting cable (with open end) for con- 1200A73nection to the injection molding machineOptional AccessoriesArt. No./Type • D-Sub plastic cover, water-tight,1557A10shielded and 25 pin D-Sub connector (CONEC 165 X 15039X)• Connecting cable (equalizing cable) for the connection of temperature sensors Length = 2 m 2295A2 Length = 5 m2295A5Ordering KeyMeasuring Range I (Calibrated)±50 000 pC 1±20 000 pC2According to order3Ratio Measuring Range I/Measuring Range II 10 14 223Channels, Sensor Connection1 channel charge, TNC neg. (IP65) 11 channel charge, BNC neg. (IP60) 22 channel charge, TNC neg. (IP65) 32 channel charge, BNC neg. (IP60) 44 channel charge, TNC neg. (IP65) 74 channel charge, BNC neg. (IP60)84 channel charge, 4 channel connector for cable type 1995A... 5****1 channel charge, TNC neg., 1 channel temperature (IP65) A***1 channel charge, BNC neg., 1 channel temperature (IP60) B***2 channel charge, TNC neg., 2 channel temperature (IP65) C***2 channel charge, BNC neg., 2 channel temperature (IP60) D***SmartAmpSmartAmp without SmartAmp, voltage output 1without SmartAmp, current output2*with SmartAmp "self-optimizing switching-point detection", voltage output 3**with SmartAmp "self-optimizing switching-point detection", current output4*** Not possible in combination with thermocouple amplifier ** Charge amplifiers are supplied only with Range I = 20000 pC and ratio Range I/Range II = 4*** Charge and thermocouple amplifier only available with Range I = 20000 pCand ratio Range I/Range II = 4**** Charge amplifiers are supplied only with Range I = 20000 pCand ratio Range I/Range II = 4; without SmartAmp; current output not available。

第15章 微弱信号检测（知识点）知识点1 概述微弱信号是相对背景噪声而言，其信号幅度的绝对值很小、信噪比很低（远小于1）的一类信号。

微弱信号检测的任务是采用电子学、信息论、计算机及物理学、数学的方法，分析噪声产生的原因和规律，研究被测信号的特点与相关性，对被噪声淹没的微弱有用信号进行提取和测量。

微弱信号检测的目的是从噪声中提取出有用信号，或用一些新技术和新方法来提高检测系统输入输出信号的信噪比。

知识点2 噪声噪声是影响微弱信号检测结果的重要因素，在微弱信号检测中，如果能够有效地克服噪声，就可以提高信号检测的灵敏度。

噪声无处不在，而且总是与信号共存，在进行微弱信号检测时，应首先设法尽量抑制噪声，然后再提取出噪声中的有用信号。

噪声是对有用信号的某种不期望的扰动，包括非被测信号或非测量系统所引起的噪声和来自于被测对象、传感器、测量系统内部的噪声两种情况。

前者可能是来自于自然界的宇宙射线、电磁干扰或人为引起的开关电火花、较强的广播信号、市电的干扰等，这些外界干扰的影响通过适当的屏蔽措施是可以减小或消除的；后者是由组成电路的器件材料的物理性质及温度等引起电荷载流子不规则运动而产生的自然扰动，是存在于电路内部的一种固有的扰动信号，这些噪声是随机的，不能精确预见，也不能彻底排除，只能设法减少或控制。

噪声是一种连续型随机变量，在不同时刻可能出现不同的噪声值。

因此，对噪声的度量要分析噪声的统计特征。

（1）噪声的概率分布噪声电压在t 时刻的大小，只能通过概率分布密度函数()p n 表示，()p n 表示噪声电压在t 时刻取值为n 的概率。

知道()p n 后，就可以知道t 时刻噪声电压取值在1n 与2n 之间的概率。

()()2112n n P n n n p n dn <<=⎰ （15.1）表征随机过程特征的统计特征量为数学期望和方差。

①数学期望[]()E n np n dn ∞-∞=⎰ （15.2）②方差[][]()()[]222D n nE n p n dn E nE n ∞-∞⎡⎤=-=-⎣⎦⎰（15.3） 电路处于稳定状态时，噪声的数学期望和方差一般不再随时间变化。

运放的正负15电压电源芯片以运放的正负15电压电源芯片为标题，我将为大家介绍关于这一主题的相关知识。

一、什么是运放的正负15电压电源芯片？运放的正负15电压电源芯片是一种电子元件，用于提供运放电路所需的正负15V电压。

它是一种集成电路芯片，通常采用稳压电源或者电池供电，能够提供所需的电压和电流，并保持稳定。

二、运放的作用和特点运放，全称为运算放大器，是一种常见的电子器件，广泛应用于各种电路中。

它主要用于放大和调节信号，具有高增益、高输入阻抗、低输出阻抗等特点。

运放可以将微弱的输入信号放大为较大的输出信号，同时还可以对输入信号进行调节和处理。

三、为什么需要正负15V电源？在一些特定的电路应用中，运放需要正负15V的电源供电。

这是因为正负15V电源可以提供足够的电压范围，以满足运放电路的工作需求。

正负15V的电源能够确保运放在工作时具有稳定的工作条件，保证输出信号的准确性和稳定性。

四、正负15V电源芯片的特点和优势正负15V电源芯片通常具有以下特点和优势：1. 稳定性：正负15V电源芯片能够提供稳定的电压和电流，保证运放电路的正常工作。

2. 高效性：正负15V电源芯片具有高效的电能转换能力，能够提供所需的功率输出。

3. 低噪声：正负15V电源芯片能够减少电路中的噪声干扰，提高信号的清晰度和准确性。

4. 节能环保：正负15V电源芯片采用先进的节能技术，具有较低的能耗和环境友好性。

5. 可靠性：正负15V电源芯片经过严格的质量控制和可靠性测试，具有较高的工作可靠性和寿命。

五、正负15V电源芯片的应用领域正负15V电源芯片广泛应用于各种电子设备和电路中，如音频放大器、信号处理器、通信设备、医疗仪器等。

它们可以提供所需的电源电压和电流，保证电路的正常工作，并提高信号的质量和稳定性。

六、正负15V电源芯片的选型和使用注意事项在选择和使用正负15V电源芯片时，需要注意以下几点：1. 电源芯片的功率和电流输出是否满足实际需求。

电子管6p15应用电路图（四款模拟电路设计原理图详解）描述电子管6p15应用电路图（一）6P15原本是用做电子管电视机的视频输出，但在电子管电视机还未普及时就被晶体管电视机取代，真可谓生不逢时，从此便少有人问津。

实际上6P15是只性能出类拔萃的宽带电压、功放两用管，能把几Hz～6.5MHz带宽的视频信号，做到线性良好的高保真放大，用于放大20KHz带宽的音频信号应当轻而易举。

6P15被冷落主要是与常用功放管“不合群”，如6P1，6P6P，6P14等管的标准工作电压，最佳负载阻抗都相同或接近，相互通用性很强。

但6P15标准板压300V，Ug2150V，负载阻抗10KΩ的参数却远离了这个范围。

因为大多数烧友都视绕制变压器为畏途，尤其是输出变压器，费时费力却未必能达到预期效果，这在很大程度上限制了6P15在烧友中的应用。

6P15的高跨导，使帘栅压对工作状态的稳定性影响极大。

一些初烧友认为6P15工作不稳易老化，主要原因是比照6P14等电路，忽略了高Ug2造成的。

6P15是只线性极佳的电子管，小编在查阅了大量资料的基础上，设计制作了两款6P15单端甲类小功放，音质远在6P1，．6P6P之上。

1、6P15在功率放大上的应用与改进多年来，一些资深烧友对如何用好6P15进行了不懈的探索。

现有可查资料中介绍的几款线路各有优点，但对初烧友来说还是有些复杂。

只有在保持其良好线性和状态稳定的前提下，将参数设计到6P14、6P1等通用管的范围内，才能使这只名管再现辉煌。

下面介绍这两款用6P15制作的胆功放。

图1是两款机器共同的电源电路。

在Ua230V，Ug2200V、Uk4V 时负载阻抗5kΩ，做到了与6P1系列通用。

6P15的la、Ig2相加约40mA，一般五、六灯收音机电源变压器输出60mA左右，因而用在此电路双声道上有些力不从心，盛夏室内听一小时就有烫手感，春秋时可工作两三个小时。

若作为卧室小音量播放或长时间欣赏，需配置不低于80mA的电源变压器。