The design that has source wave filter
【Abstract】 The program of this graduated design is the design that has source wave filter. According to the transmission characteristic of the OTA , some OTA signal operation circuits and continuous time gm - c filters
which are founded in the current mode methods are designed , and the derivation process of the transfer function is also given. Here, I will first know RC, have the design of source wave filter, The various methods of approaching of wave filter, Frequency is alternated and goes to OTA-C wave filter from RC wave filter alternate project.
The circuit structure of OTA-C wave filter is simple , In this design, Have put forward to adopt signal, flow out the method that picture realizes arbitrary step OTA-C general wave filter . Through the direct analysis for network function, Derivation the OTA-C of arbitrary step transmission function realize circuit. In writing, the design example that has given wave filter is imitated with PSPICE, Mention method with proof is feasibled .
Key word:singal flow graph ;operational-transconductance-amplifier (OTA ) ; active filter ; continuous- time