基于LabVIEW的锁定放大器的设计

s the rapid development of the electronic technology and computer technology, a wide range of test instruments, the requirements on the hardware become more and more higher. The increasing volume of instruments gives inconvenient for users to carrying and maintaining upgrade. In addition, since the high price, Virtual instrument appeared. It makes original functions of hardware replaced by the software. Based on the correlation detection principle of lock-in amplifier and in virtue of the LabVIEW virtual instrument development tools, a lock-in amplifier is designed preliminary. Simultaneously, In order to verify the various functions of the lock-in amplifier, a virtual signal generator also is designed. It proves that this design reach to wipe off the noise and amplify amplitude of useful signal from the input signal.