发明授权
US5630228A Double balanced mixer circuit with active filter load for a portable
comunication receiver
失效
具有有源滤波器负载的双平衡混频器电路，用于便携式通信接收器
- 专利标题： Double balanced mixer circuit with active filter load for a portable comunication receiver
- 专利标题（中）： 具有有源滤波器负载的双平衡混频器电路，用于便携式通信接收器
-
申请号： US427026申请日： 1995-04-24
-
公开(公告)号： US5630228A公开(公告)日： 1997-05-13
- 发明人: James G. Mittel
- 申请人： James G. Mittel
- 申请人地址： IL Schaumburg
- 专利权人： Motorola, Inc.
- 当前专利权人： Motorola, Inc.
- 当前专利权人地址： IL Schaumburg
- 主分类号： H03D7/14
- IPC分类号： H03D7/14 ; H04B1/26 ; H04B1/30 ; H04L27/233 ; H04B1/16
摘要：
A double balanced mixer circuit (50) having a multiplication circuit (10) and an active filter circuit (30) coupled to the multiplication circuit (10). The active filter circuit (30) has a common-base differential amplifier (32) coupled to the differential outputs (52,54) of the multiplication circuit (10) and generates differential current outputs in response to the differential output current signal of the multiplication circuit (10), and a differential second order low pass active filter (34) coupled to the common-base differential amplifier (32) for filtering the differential current outputs of the common-base differential amplifier (32) and generating a filtered differential mixer output signal. A single direct current source coupled to the multiplication circuit (10) is also used to bias the active filter circuit (30). The mixer circuit (50) has utility in a non-differential mode as well as a fully differential mode.
公开/授权文献
- US5055334A Heat protective cover for hot water pipes 公开/授权日：1991-10-08
信息查询
IPC分类:
