D 15.26 Design the quadrature oscillator circuit in Fig. 15.11(a) to obtain sinusoids with 5-V amplitude and 10-kHz frequency. Use R = 10 kΩ, V+ = −V− = 15 V, R1 = R4 = 10 kΩ, R2 = R3, and the diode voltage drop VD = 0.7 V. Specify all component values.
C = 1.59 nF; Rf slightly smaller than 20 kΩ; R3 = 2.74 kΩ; R4 = 10 kΩ
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