Charge Amplifiers

                                        Charge amplifiers convert the charge output by a piezoelectric Sensor into a prop or tional voltage, which is used as an input variable for analysis systems, and can be digitized in an analog-to-digital (A/D) converter if necessary. A charge amplifier basically consists of an inverting voltage amplifier with a high open-loop gain and capacitive negative feedback. It relies on a metal oxide semiconduct or field effect transist or (MOSFET) or a junction field effect transist or (JFET) at its input to achieve high insulation resistance and minimize leakage current. If the open-loop gain is sufficiently high, the cable and Sensor capacitance can be neglected, leaving the output voltage dependent on just the charge at the charge amplifier input and the range capacit or .

                                        Charge Amplifiers

                                        Charge amplifiers convert the charge output by a piezoelectric Sensor  into a prop or tional voltage, which is used as an input variable for  analysis systems, and can be digitized in an analog-to-digital (A/D) converter if necessary. A charge amplifier basically consists of an inverting voltage amplifier with a high open-loop gain and capacitive negative feedback. It relies on a metal oxide semiconduct or  field effect transist or  (MOSFET)  or  a junction field effect transist or  (JFET) at its input to achieve high insulation resistance and minimize leakage current. If the open-loop gain is sufficiently high, the cable and Sensor  capacitance can be neglected, leaving the output voltage dependent on just the charge at the charge amplifier input and the range capacit or .

                                         

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                                        YMC8101 Miniature Charge Amplifier for industrial Use

                                        Rugged, sealed case; with various connection facilities; also available with range adjusted to a specific Sensor . Its rugged construction makes it particularly suitable for  installation on site in machine monit or ing systems.

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                                        YMC8102:multiple input type:Charge, Voltage, IEPE; Optional Gain, High-pass filters, Low-pass Filters, Sensitivity unifor mization; Built-in double integrators circuit for  acceleration, displacement and velocity; Switchable for  Gain, LPF, HPF, Sensitivity n or malized. Charge and Voltage input. Int. Battery and Ext. Source Supply.

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                                        YMC 8102A:Desktop low noise Charge amplifier (general test)

                                        YMC 8102T:panel mounted low noise Charge amplifier

                                        Gain, High pass and low pass, n or malized, such as external regulation, voltage (V) and Charge (PE) 2 kinds of input mode, can be positive and negative power supply converter;

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                                        YMC8103 Multi-channel Charge Amplifier

                                        Features:Assembled Multi-channels (4chs,6 chs and 8 chs available);Small size, high integration ;Three decimal-system unifor mization output(1-10 pC/UNIT);Switchable for  Gain and LPF ;Low noise and wide frequency band(0.3 to 100kHz);Low price, suitable for  multi-point test;Overload indication

                                         

                                        Model

                                        YMC8101

                                        YMC8102

                                        YMC8102 A/T

                                        YMC8103

                                        Input Range

                                        ±5╳104pC

                                        Voltage/IEPE:±10V

                                        Charge:±106pC

                                        Voltage:±10V ;

                                        Charge:±106pC

                                        ±105pC

                                        Sensitivity Unifor mization

                                        1 - 9.99

                                        Adjustable

                                        0.100~999

                                        1.00~1099

                                        1.00~10.99

                                        Gain

                                        mV/pC

                                        1 - 100Fixed

                                        0.01,0.1,1,

                                        10,100,1000

                                        0.01,0.1,1,

                                        10,100,1000

                                        1,3,10,30,100

                                        300,1000

                                        High-pass Filters

                                        Hz

                                        1Fixed

                                        A:0.3,1,310,30,100

                                        V:1 ,3,10,30,100

                                        D:1 ,3,10,30,100

                                        0.3,1,3,10,30,100

                                        0.3 (Fixed)

                                        Low-pass Filters

                                        kHz

                                        ≤100Fixed

                                        0.3,1,3,10,30,100

                                        0.3,1,3,10,30,100

                                        0.3,1,3,10,30,100

                                        Accuracy

                                        %

                                        ±1

                                        A:±1; V:±3 ;D:±3

                                        ±1

                                        ±1

                                        Noise

                                        μV

                                        ≤10

                                        ≤5

                                        ≤5

                                        ≤5

                                        Output Range

                                        V

                                        ±5

                                        ±10

                                        ±10

                                        ±10

                                        Power Supply


                                        DC:±14V - ±18V

                                        220V50Hz0.1A

                                         or  110V60Hz0.2A

                                        220V50Hz0.1A

                                         or  DC±18V-±27V

                                        220V50Hz0.3A

                                         or  DC±18V

                                        Operating Temperature

                                        -10 - +50

                                        -10 - +50

                                        -10 - +50

                                        -10 - +50

                                        Weight

                                        kg

                                        0. 2

                                        1.3

                                        1.5

                                        5.0(6 chs)

                                        Size

                                        mm

                                        80×50×24

                                        45×122×200

                                        70×132×200

                                        236×132.5×300

                                         (6 chs)


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