超再生接收机US6873838（英文）

超再生接收机原理，国外专利(该为部分缺失资料请下载观看完整版）

ABSTRACT US 2002/0168957 A1 Nov. 14， 2002 A superregenerative oscillator RF receiver having a differ ， ential output that has the advantage of providing an Int. Cl- improved Operating range and increased receiver Sensitivity （52） US‘ Cl-“ 455/336245125; 4:55; Without affecting receiver cost or current requirements. The _ ~ ; present invention comprises a receiver that has a super （58） Fleld 0f Search 455/334， 336， regenerative Oscillator from which the demodulated Output 455/337， 338， 343-1， 205， 214， 215 is taken in differential form. This is achieved by generating _ collector and emitter output signals， loW pass ？ltering both （56） References Clted signals， and then combining them in a difference ampli？er. U.S. PATENT DOCUMENTS The resulting Waveform contains approximately tWice the signal content than Would be yielded from a singled-ended 3，746，999 A * 7/1973 Free/n‘455/336 circuit. The preferred embodiment of present invention can 378057184 A 4/1974 ‘7151011： In ct a1~ also achieve quench noise cancellation With proper layout 3352110 A 12/1974 Grebene and the use of a common mode loW pass ？lter followed by 3，869，679 A 3/1975 Grebene a difference am li？er