EP 2013968 A1 20090114 - OPERATIONAL AMPLIFIER
Title (en)
OPERATIONAL AMPLIFIER
Title (de)
OPERATIONSVERSTÄRKER
Title (fr)
AMPLIFICATEUR OPÉRATIONNEL
Publication
Application
Priority
- EP 2007003589 W 20070424
- DE 102006020485 A 20060428
Abstract (en)
[origin: WO2007124895A1] An operational amplifier and use of an operational amplifier with a difference amplifier (A1, A2, A3, A4) which is linked to a first input (In<SUB>11</SUB>, In<SUB>12</SUB>, In<SUB>13</SUB>, In<SUB>14</SUB>) and to a second input (In<SUB>21</SUB> , In<SUB>22</SUB>, In<SUB>23</SUB>, In<SUB>24</SUB>), and with a differential output stage (D1, D2, D3, D4) which is linked to the difference amplifier (A1, A2, A3, A4) and to a first output (O<SUB>21</SUB>, O<SUB>22</SUB>, O<SUB>23</SUB>, O<SUB>24</SUB>) and a second output (O<SUB>11</SUB>, O<SUB>12</SUB>, O<SUB>13</SUB>, O<SUB>14</SUB>), in which the differential output stage (D1, D2, D3, D4) has a first branch with two first transistors ([M<SUB>P211</SUB>, M<SUB>N211</SUB>], [M<SUB>P221</SUB>, M<SUB>N221</SUB>], [Q<SUB>P231</SUB>, Q<SUB>N231</SUB>], [Q<SUB>P241</SUB>, Q<SUB>N241</SUB>]), the drain and/or collector of which are linked to each other and to the first output (O<SUB>21</SUB>, O<SUB>22</SUB>, O<SUB>23</SUB>, O<SUB>24</SUB>), the differential output stage (D1, D2, D3, D4) has a second branch with two second transistors ([M<SUB>P212</SUB>, M<SUB>N212</SUB>], [M<SUB>P222</SUB>, M<SUB>N222</SUB>], [Q<SUB>P232</SUB>, Q<SUB>N232</SUB>], [Q<SUB>P242</SUB>, Q<SUB>N242</SUB>]), the drain and/or collector of which are linked to each other and to the second output (O<SUB>11</SUB>, O<SUB>12</SUB>, O<SUB>13</SUB>, O<SUB>14</SUB>), the first gates and/or the first bases of the two first transistors ([M<SUB>P211</SUB>, M<SUB>N211</SUB>], [M<SUB>P221</SUB>, M<SUB>N221</SUB>], [Q<SUB>P231</SUB>, Q<SUB>N231</SUB>], [Q<SUB>P241</SUB>, Q<SUB>N241</SUB>]) in the first branch are linked to each other and to a first output (O<SUB>D11</SUB>, O<SUB>D12</SUB>, O<SUB>D13</SUB>, O<SUB>D24</SUB>) of the difference amplifier (A1, A2, A3, A4), the second gates and/or the second bases of the two second transistors ([M<SUB>P212</SUB>, M<SUB>N212</SUB>], [M<SUB>P222</SUB>, M<SUB>N222</SUB>], [Q<SUB>P232</SUB>, Q<SUB>N232</SUB>], [Q<SUB>P242</SUB>, Q<SUB>N242</SUB>]) in the second branch are linked to each other and to a second output (O<SUB>D21</SUB>, O<SUB>D22</SUB>, O<SUB>D23</SUB>, O<SUB>D14</SUB>) of the difference amplifier (A1, A2, A3, A4), the differential output stage (D1, D2, D3, D4) has a constant-current source (CS<SUB>21</SUB>, CS<SUB>22</SUB>, CS<SUB>23</SUB>, CS<SUB>24</SUB>), which is linked to each branch in order to supply a current (I<SUB>21</SUB>, I<SUB>22</SUB>, I<SUB>23</SUB>, I<SUB>24</SUB>) through the branches.
IPC 8 full level
H03F 3/45 (2006.01)
CPC (source: EP US)
H03F 3/45076 (2013.01 - EP US); H03F 3/45085 (2013.01 - EP US); H03F 3/45183 (2013.01 - EP US); H03F 2203/45652 (2013.01 - EP US)
Citation (search report)
See references of WO 2007124895A1
Designated contracting state (EPC)
DE FR
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
WO 2007124895 A1 20071108; CN 101432964 A 20090513; CN 101432964 B 20120418; DE 102006020485 A1 20071115; DE 102006020485 B4 20190704; EP 2013968 A1 20090114; US 2008084245 A1 20080410; US 7535300 B2 20090519
DOCDB simple family (application)
EP 2007003589 W 20070424; CN 200780015703 A 20070424; DE 102006020485 A 20060428; EP 07724519 A 20070424; US 79707207 A 20070430