公开(公告)号：WO2016142512A1

公开(公告)日：2016-09-15

申请号：PCT/EP2016/055275

申请日：2016-03-11

Applicant: LASER COMPONENTS GMBH

Inventor： DOCTOR, Alan

IPC: G01J1/44 ,  G01J5/24 ,  G01J5/34

CPC classification number: G01J5/34 ,  G01J1/44 ,  G01J5/24 ,  G01J2001/444

Abstract: A differential pyroelectric infrared detector circuit formed by connecting a pyroelectric crystal to two separate impedance conversion circuits. The separate circuits derive two low impedance outputs which are connected to a differential or instrumentation amplifier. The circuit will eliminate electronic perturbations from outside sources such as line frequency interference or notice from an external but nearby oscillator which may be used to operate a microprocessor circuit, and other sources of electronic noise. The two outputs when connected differentially also have an output which is a factor of two greater than a normal standard single ended device, but also only produce noise which is only the square root of 2 or greater. The circuit additionally increased the signal to noise of the detector by a factor of the square root of the increase in signal or by about 1.41 times the standard single ended device.

Abstract translation: 通过将热电晶体连接到两个单独的阻抗转换电路而形成的差分热释电红外检测器电路。 单独的电路导出两个连接到差分或仪表放大器的低阻抗输出。 该电路将消除来自外部来源的电子扰动，例如线路频率干扰或可能用于操作微处理器电路的外部但附近振荡器的通知以及其他电子噪声源。 连接差分时的两路输出也具有比正常的标准单端设备大两倍的输出，而且只产生仅为2或更大的平方根的噪声。 该电路额外增加了信号的信噪比，信号增加的平方根是标准单端器件的大约1.41倍。

公开(公告)号：EP3268706B1

公开(公告)日：2020-10-28

申请号：EP16709772.4

申请日：2016-03-11

Applicant: Laser Components GmbH

Inventor： DOCTOR, Alan

IPC: G01J1/44 ,  G01J5/24 ,  G01J5/34

公开(公告)号：EP3268706A1

公开(公告)日：2018-01-17

申请号：EP16709772.4

申请日：2016-03-11

Applicant: Laser Components GmbH

Inventor： DOCTOR, Alan

IPC: G01J1/44 ,  G01J5/24 ,  G01J5/34

CPC classification number: G01J5/34 ,  G01J1/44 ,  G01J5/10 ,  G01J5/24 ,  G01J2001/444 ,  G08B13/19 ,  G08B13/191 ,  H01L37/02

Abstract: A differential pyroelectric infrared detector circuit formed by connecting a pyroelectric crystal to two separate impedance conversion circuits. The separate circuits derive two low impedance outputs which are connected to a differential or instrumentation amplifier. The circuit will eliminate electronic perturbations from outside sources such as line frequency interference or notice from an external but nearby oscillator which may be used to operate a microprocessor circuit, and other sources of electronic noise. The two outputs when connected differentially also have an output which is a factor of two greater than a normal standard single ended device, but also only produce noise which is only the square root of 2 or greater. The circuit additionally increased the signal to noise of the detector by a factor of the square root of the increase in signal or by about 1.41 times the standard single ended device.