Quelpr
4 marksOperational Amplifiers

CAPE Physics Unit 2 · 2004 · Paper 2 · Question 6(d)

Design a circuit to combine two signals v_1 and v_2 to form an output v_o = -v_1 - 20v_2, where the minimum input resistance for both signal inputs is no less than 10 kΩ.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 6(a)(i)Show that the closed loop voltage gain, A, in the circuit is given by A = 1 + R_f / R_i.[4 marks]
  2. 6(a)(ii)Explain how the circuit differs from that of an inverting amplifier circuit.[2 marks]
  3. 6(a)(iii)State what the input impedance of the non-inverting amplifier is.[2 marks]
  4. 6(b)The saturation voltage of the non-inverting amplifier is 15 V. If R_f = 100 kΩ and R_i = 50 kΩ, determine the maximum input voltage, v_i, such that saturation…[2 marks]
  5. 6(c)Determine the value of R_f and the range of the rheostat R_s.[6 marks]

More practice: the rest of this paper · more Operational Amplifiers questions · all CAPE Physics Unit 2 past papers