1
GATE ECE 2004
+2
-0.6
The value of 'C' required for a sinusoidal oscillation of frequency 1 KHz in the circuit of the figure is
A
$${1 \over {2\pi }}\mu F$$
B
$$2\pi \,\mu \,F$$
C
$${{1 \over {2\pi \sqrt 6 }}^{}}\mu F$$
D
$$2\pi \,\sqrt 6 \,\mu F$$
2
GATE ECE 2003
+2
-0.6
The oscillator circuit shown in the figure has an ideal inverting Amplifier. It's frequency of Oscillation (in Hz) is
A
$${1 \over {2\pi \sqrt {6\,} RC}}$$
B
$${1 \over {2\pi RC}}$$
C
$${1 \over {\sqrt 6 RC}}$$
D
$${1 \over {\sqrt 6 (2\pi RC)}}$$
3
GATE ECE 2002
+2
-0.6
The circuit in the figure employs positive Feedback and is intended to generate sinusoidal oscillation. If at a frequency f$$_0$$, B(f)= $${{\Delta {V_f}(f)} \over {{V_0}(f)}} = {1 \over 6}\,\,\angle {0^0}$$ then to sustain oscillation at this frequency.
A
$${R_2}\, = \,5\,\,{R_1}$$
B
$${R_2}\, = \,6\,\,{R_1}$$
C
$${R_2}\, = {{{R_1}} \over 5}$$
D
$${R_2}\, = {{{R_1}} \over 6}$$
4
GATE ECE 2001
+2
-0.6
The Oscillator circuit shown in the figure is
A
Hartley Oscillator with $${f_{oscillation}}$$= 79.6 MHz
B
Colpitts Oscillator with $${f_{oscillation}}$$ =50.3 MHz
C
Hartley Oscillator with $${f_{oscillation}}$$= 159.2 MHz
D
Colpitts Oscillator with $${f_{oscillation}}$$=159.2 MHz
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