A 36 V Programmable Instrumentation Amplifier With Sub-20 $\mu$V Offset and a CMRR in Excess of 120 dB at All Gain Settings

Capacitively Coupled Chopper Instrumentation Amplifiers for High-Side Current Sensing

“…Due to the use of capacitive coupling at its input, the DC CM input currents are eliminated. No active blocks need to be powered by the HV supply, which saves considerable power [2,3,12]. With the proposed floating input chopper, the input CMVR is ±30 V, which is the breakdown voltage of the input high-voltage capacitors.…”

“…In 2009, a current-mode chopper IA based on the three-opamp topology was published by Schaffer [3]. A simplified block diagram of this IA is shown in Fig.…”

Low-power wide-bandwidth CMOS indirect current feedback instrumentation amplifier

“…Among them, current feedback (CF) [6][7][8][9][10][11][12][13][14][15], supply current sensing (SCS) [16,17], differential difference amplifiers (DDAs) [2,18] or current-mode solutions [19,20] may be enumerated. Besides, techniques such as auto-zero [21], correlated-double sampling [22], chopping [23][24][25][26][27][28][29][30][31][32][33][34], ACcoupling [35] or discrete-time signal processing [36] are often used, especially in low-frequency high-gain applications where 1/f noise and offset voltage play a critical role.…”

A New Proposal for OFCC-based Instrumentation Amplifier

“…This papers aims at presenting an instrumentation amplifier (IA) which is inevitably used in areas pertaining to industrial process control [17], automotive transducers [18], bio-potential acquisition systems [19][20] and linear position sensing [21], to suppress unwanted common mode noise and to amplify differential signals. In general, the IA structures are classified according to the active block used for realization or on the basis of type of input/output it processes/provides.…”