J2101A Injection Transformer 10Hz - 45MHz

J2101A   Product Information 詳細規格：

The usable bandwidth of an injection transformer is generally significantly greater than the 3dB frequency limits. This is because the transformer itself is outside of the measurement, leading many to incorrectly believe that the transformer is a non-critical element.

The bandwidth of the transformer is strongly related to the terminating impedance. The most network analyzers provide a 50 Ohm oscillator source impedance. Assuming this impedance the optimal termination resistor is 5 Ohms. This significantly attenuates the injection signal, which is generally beneficial, as a common error in Bode measurements is using a signal which is too large, and therefore not a small signal measurement. An added benefit of this low value is that it can generally be left in circuit at all times, simplifying the connection to the network analyzer without appreciably impacting the output voltage of the circuit being tested.

• 10Hz supports off-line power supplies


• 45MHz high enough for even state of the art regulators


• 23 Octave range


• Low distortion for superior precision


• 5 Ohm termination for minimum impact to loop


• Includes attenuation to assure small signal measurement


• cilloscopes and and Spectrum Analyzers