In a constant current source, the current, which is independent of the load voltage, remains constant over a limited range, which is the compliance voltage range.

simple current mirror, the compliance voltage is VDS,sat2. The circuit is exactly the same as the basic current mirror circuit using two BJT transistors.But there is a modification in the output transistor. Request PDF | An Extremely Low-Voltage and High-Compliance Current Mirror | In this paper, a novel ultrahigh-compliance, low-voltage and low-power current mirror is proposed. I then thought about simply using an iDAC and current mirror, but i've never used a current mirror. I think that the Do you guys think the iDAC + An improved current mirror structure suitable for low voltage analog applications is proposed which has high output impedance (",5 Mn), high bandwidth (",400 MHz), low input «0.4 V) and output compliance voltages «0.5 V) and high If the voltage exceeds the compliance voltage, the current source loses its regulation and the current may damage the components such as transistors, diodes, LEDs, etc. Diode junction 0.7 V maintains constant base voltage, and constant base current. As previously mentioned, to obtain good matching between input and output currents, the drain-to-source voltages … IMPLEMENTATION AND APPLICATIONS OF CURRENT SOURCES AND CURRENT RECEIVERS R. Mark Stitt (602) 746-7445 This application guide is intended as a source book for the design and application of: Current sources Current sinks Floating current sources Voltage-to-current converters (transconductance amplifiers) Current-to-current converters (current mirrors) Current … Important attributes for current sources include high output resistance with a wide range of voltage compliance and rejection of external variations such as power supply or temperature. The goal of this activity is to study the BJT current source or current mirror. Another excellent current mirror circuit is the Widlar Current Source Circuit, invented by Bob Widlar.. I want to create a 0-100uA constant current pulse with 20V compliance for use as biological stimulation device. The voltage drop across the diode probably won’t be 0.7 volts exactly. I was originally planning to use a VDAC and an external voltage-controled current source to generate the current pulse. In the video, the programmed voltage across Q2’s collector is reflecting across the Q3 collector. Circuit output behavior for Figure 1; at the compliance voltage VCV where output resistance begins a rapid drop to low values, the output transistor is in saturation by VBC = −VSAT The top panel in Figure 2 shows the current-voltage I-V behavior of the mirror. The ratio of the input to output currents is also process dependent. It delivers a DC current of 10 mA for voltages below approximately 5.55V. The exact amount of forward voltage dropped across it depends on the current through the diode, and the diode’s temperature, all in accordance with the diode equation. Widlar Current Mirror Technique. Because of this process dependency, good layout techniques such as interdigitized and common-centroid methods are used to layout current mirrors. The lower