Copy of ADA4807 test circuit - on Thu, 11/05/2020 - 00:08 f74099025Designer236303 × f74099025 Member for 3 years 5 months 4 designs 1 groups Add a bio to your profile to share information about yourself with other SystemVision users. https://explore.partquest.com/node/371078 <iframe allowfullscreen="true" referrerpolicy="origin-when-cross-origin" frameborder="0" width="100%" height="720" scrolling="no" src="https://explore.partquest.com/node/371078"></iframe> Title Description About text formats Tags ADA4807OpAmp Select a tag from the list or create your own.Drag to re-order taxonomy terms. License - None -
Copy of Op-amp feedback resistor and stability - on Fri, 06/19/2020 - 08:17 ton.pijpers44Designer232538 × ton.pijpers44 Member for 3 years 9 months 1 designs 1 groups Add a bio to your profile to share information about yourself with other SystemVision users. https://explore.partquest.com/node/324060 <iframe allowfullscreen="true" referrerpolicy="origin-when-cross-origin" frameborder="0" width="100%" height="720" scrolling="no" src="https://explore.partquest.com/node/324060"></iframe> Title Description <p>This circuit shows the interaction effect between an op-amp's input capacitance and relatively large resistance values used in the feedback network. This example implements the test circuit described in this interesting article by Analog Devices: https://t.co/xA548xt4BT</p> <p>The undesired peaking observed in the frequency-domain closed-loop transfer function, and the ringing in the time-domain step response, depend on the resistor values chosen for r_fb and r_g. The ratio of these resistors must equal 1.0, for the desired low-frequency closed-loop non-inverting gain of 2.0. But if the actual value of each resistor is set to 499 Ohms, as recommended in the article, these problems are greatly reduced.</p> <p>Note that the op-amp model used in this circuit was created using the Datasheet Model Builder tool, and is based on the corresponding Analog Devices Datasheet (Rev A). The common-mode input capacitance is not included in the model, so two capacitors were added externally in this circuit. In addition, note that the value of that capacitance is specified as 1 pF in the Datasheet, but each capacitor is set to 4.5 pF here. This value is based on the published SPICE model for this part, and was used to more closely match the SPICE simulation results shown in the article.</p> About text formats Tags ADA4807op-amp stability Select a tag from the list or create your own.Drag to re-order taxonomy terms. License - None -
ADA4807 test circuit DarrellDesigner10 × Darrell Member for 10 years 5 months 624 designs 10 groups Big fan of VHDL-AMS https://explore.partquest.com/node/101286 <iframe allowfullscreen="true" referrerpolicy="origin-when-cross-origin" frameborder="0" width="100%" height="720" scrolling="no" src="https://explore.partquest.com/node/101286"></iframe> Title Description About text formats Tags ADA4807OpAmp Select a tag from the list or create your own.Drag to re-order taxonomy terms. License - None -
Op-amp feedback resistor and stability HaiNguyenDesigner65711 × HaiNguyen Member for 7 years 8 months 1 designs 1 groups Add a bio to your profile to share information about yourself with other SystemVision users. https://explore.partquest.com/node/89141 <iframe allowfullscreen="true" referrerpolicy="origin-when-cross-origin" frameborder="0" width="100%" height="720" scrolling="no" src="https://explore.partquest.com/node/89141"></iframe> Title Description <p>This circuit shows the interaction effect between an op-amp's input capacitance and relatively large resistance values used in the feedback network. This example implements the test circuit described in this interesting article by Analog Devices: https://t.co/xA548xt4BT</p><p>The undesired peaking observed in the frequency-domain closed-loop transfer function, and the ringing in the time-domain step response, depend on the resistor values chosen for r_fb and r_g. The ratio of these resistors must equal 1.0, for the desired low-frequency closed-loop non-inverting gain of 2.0. But if the actual value of each resistor is set to 499 Ohms, as recommended in the article, these problems are greatly reduced.</p><p>Note that the op-amp model used in this circuit was created using the Datasheet Model Builder tool, and is based on the corresponding Analog Devices Datasheet (Rev A). The common-mode input capacitance is not included in the model, so two capacitors were added externally in this circuit. In addition, note that the value of that capacitance is specified as 1 pF in the Datasheet, but each capacitor is set to 4.5 pF here. This value is based on the published SPICE model for this part, and was used to more closely match the SPICE simulation results shown in the article. </p> About text formats Tags ADA4807op-amp stability Select a tag from the list or create your own.Drag to re-order taxonomy terms. License - None -
Op-amp feedback resistor and stability Mike DonnellyDesigner19 × Mike Donnelly Member for 10 years 5 months 1,541 designs 10 groups Member of the PartQuest Explore Development Team. Focused on modeling and simulation of analog, mixed-signal and multi-discipline systems covering a broad range of applications, including power electronics, controls and mechatronic systems. https://explore.partquest.com/node/38971 <iframe allowfullscreen="true" referrerpolicy="origin-when-cross-origin" frameborder="0" width="100%" height="720" scrolling="no" src="https://explore.partquest.com/node/38971"></iframe> Title Description <p>This circuit shows the interaction effect between an op-amp's input capacitance and relatively large resistance values used in the feedback network. This example implements the test circuit described in this interesting article by Analog Devices: https://t.co/xA548xt4BT</p><p>The undesired peaking observed in the frequency-domain closed-loop transfer function, and the ringing in the time-domain step response, depend on the resistor values chosen for r_fb and r_g. The ratio of these resistors must equal 1.0, for the desired low-frequency closed-loop non-inverting gain of 2.0. But if the actual value of each resistor is set to 499 Ohms, as recommended in the article, these problems are greatly reduced.</p><p>Note that the op-amp model used in this circuit was created using the Datasheet Model Builder tool, and is based on the corresponding Analog Devices Datasheet (Rev A). The common-mode input capacitance is not included in the model, so two capacitors were added externally in this circuit. In addition, note that the value of that capacitance is specified as 1 pF in the Datasheet, but each capacitor is set to 4.5 pF here. This value is based on the published SPICE model for this part, and was used to more closely match the SPICE simulation results shown in the article. </p> About text formats Tags ADA4807op-amp stability Select a tag from the list or create your own.Drag to re-order taxonomy terms. License - None -