PURPOSE:To secure a control for the amplitude ratio for a specified period between the chroma signal and the burst signal obtained through the color signal process via the video tape recorder by utilizing both the switching and amplifying functions of the double balanced differential amplifier. ...
There is disclosed a variable-gain amplifier circuit comprising an adjustable impedance circuit part including a bipolar transistor having a base connected to a control terminal for receiving a controlled bias voltage, a collector connected to a positive power supply voltage terminal, and an emitter co...
Variable gain amplifier circuit 专利内容由知识产权出版社提供 专利名称:Variable gain amplifier circuit 发明人:Ishihara, Hisaya c/o NEC IC Microcomp Sys t e ms ,L t d. 申请号:EP99103131.1 申请日:19990217 公开号:EP0938188B1 公开日:20060607 摘要:A variable gain amplifier circuit enables the ...
Embodiments of a variable gain amplifier circuit are described. In one embodiment, multiple resistor devices are coupled in series to form a string of resistor devices and to receive an input current. A multiple input operational amplifier device has an amplifier output coupled to a feedback ...
The op amp variable gain circuit below maintains input impedance over the range of the gain, providing a distinct advantage in some instances.Op amp variable gain circuitThe circuit is very simple, and only uses one additional component over that of a basic operational amplifier circuit. The ...
A variable-gain amplifier circuit has an offset correcting function by which the fluctuation of offset due to the switching of a gain is decreased. In an offset detection mode, an input offset voltage of the variable-gain amplifier circu... T Yamaji,T Itakura,H Tsurumi - US 被引量: 55发...
The transmission circuit, and the communication equipment which uses that Gain control section 18 controls the profit of variable profit amplifier 14 on the basis of the temperature information of amplitude modulation section 15. Variable profit amplifier 14 expands the angular modulating signal with ...
Taidacent AD603 Low Noise Variable Gain Amplifier VCA Module Voltage Controlled Variable Gain Amplifier Circuit Product Description This amplifier module is a voltage controllable gain amplifier. It consists of two AD603 cascade amplifiers. It c...
专利名称：Variable-gain amplifier 发明人：Francois Berrod,Fernand Puverel 申请号：US05/407996 申请日：19731019 公开号：US03942181A 公开日：19760302 专利内容由知识产权出版社提供 摘要：A variable-gain amplifier comprises a transistor with an emitter connected in a degenerative emitter-follower circuit ...
In order to provide a variable gain amplifier of enhanced linearity and wide variable gain range, an AM-modulated signal reception circuit in which the noise of an input portion is