Experimental Training Equipments-> Oscillators (Transistor Op-Amp Based)

[1]   Click to Enlarge HARTLEY OSCILLATOR Objectives of this experiment: To construct a series - fed transistor Hartley Oscillator. 1. To change frequency determining compenents and observe variation in frequency 2. To measure any harmonic frequency present. Hartley oscillator is used for varying frequency over large ranges, as in local oscillators of radio receivers. Built in regulated power supply: + 15V/300mA Input Supply: 230 VAC/50Hz mains operated. Dimension: 27cms x 17cms x 10cms. Weight: 500gms See Enlarge Click to Enlarge COLPITT'S OSCILLATOR Objectives of this experiment:- 1. To construct a basic COLPITT'S oscillator, using a transistor. 2. To determine the frequency of oscillation. To measure any harmonic frequencies generated by it. Colpitt's oscillator is used for fixed frequency of oscillation. Built in regulated power supply: +15V/300mA Input Supply: 230 VAC/50Hz mains operated. Dimension: 27cms x 17cms x 10cms. Weight: 500gms See Enlarge Click to Enlarge CRYSTAL OSCILLATOR Objectives of this experiment: To construct a complementary transistor power amplifier. To measure two different types of distortion (cross-over distortion & distortion due to nonlinearly) by observing it on an oscilloscope, or hearing from a loud speaker. On a CRO, you can observe the different output waveforms produced, while the circuit bias is changed and while the input signal level is changed. You can also hear two different types of distortion from a loudspeaker. Built in regulated power supply: +15V/300 mA Input Supply: 230 VAC/50Hz mains operated. Dimension: 27cms x 17cms x 10cms. Weight: 500gms See Enlarge Click to Enlarge PIERCE OSCILLATOR Objectives of this experiment: 1. To construct a Pierce oscillator using quartz crystal and verify the series resonant frequency and parallel resonant frequency. 2. To determine the stability of the oscillator. Built in regulated power supply: + 15V/300mA Input Supply: 230 VAC/50Hz mains operated. Dimension: 27cms x 17cms x 10cms. Weight: 500gms See Enlarge Click to Enlarge PHASE SHIFT OSCILLATOR Objectives of this experiment: 1. To determine the range frequency of an R-C phase shift oscillator. To construct RC phase shift oscillator & to compare the phase shift networks and feedback voltages in this oscillator. R-C oscillator uses resistors and capacitors as the frequency determining compenents. Each element of R-C network shifts the phase by 60 degrees. Three such elements shifts the phase by 180degrees. A transistor amplifier, associated with this network shifts the phase by another 180 degrees. Thus the R-C network and the transistor shifts the phase by 360 degrees in positive feed back circuit, throwing it into oscillation. This type of oscillator is used as a fixed frequency oscillator. Built in regulated power supply: + 15V/300mA Input Supply: 230 VAC/50Hz mains operated. Dimension: 27cms x 17cms x 10cms. Weight: 500gms See Enlarge Click to Enlarge WIEN-BRIDGE OSCILLATOR (OP-AMP VERSION) Objectives of this experiment: 1. To construct a wein-bridge oscillator and determine the resistor ratio required to develop the correct degenerative feedback. 2. To insert a simple automatic gain-control and observe the effect on oscillator operation. 3. To vary the values of resistance and capacitance In the lead-lag network and to observe the resultant frequency changes. To construct wein bridge oscillator using RC combination, usually preferred for low frequency application. A lead lag R-C network determines the oscillator frequency and controls the amount of regenerative feedback for the oscillator. Degenerative feedback is set by a resistance voltage divider. Built in regulated power supply: + 15V/300mA, -15V/300mA Input Supply: 230 VAC/50Hz mains operated. Dimension: 27cms x 17cms x 10cms. Weight: 500gms See Enlarge Click to Enlarge TRANSISTORIZED WEIN-BRIDGE OSCILLATOR Objectives of this experiment: Positive feedback in Wein-Bridge Oscillator is to use two stage RC coupled Amplifier. Since first stage of the RC-Coupled amplifier introduces a phase shift of 180 degree. Second stage introduces phase shift of 360 degree. Positive feedback network makes the input Vin and output Vout in the same phase. The frequency of oscillator. In addition to the positive feedback the circuit is also provided with negative feedback to make the oscillations stable. Observe the output waveform on CRO. By varying the resistor R1 the frequency will change. Built in regulated power supply: +15V/500mA Input Supply: 230 VAC/50Hz mains operated. Dimension: 27cms x 17cms x 10cms. Weight: 500gms See Enlarge Click to Enlarge TWIN-T OSCILLATOR Objectives of this experiment: TWIN-T OSCILLATOR (OR) NOTCH FILTER notches or attenuates frequency near the oscillator frequency. An op-amp is used as the amplifier in this oscillator. The positive feedback is through the voltage divider to the non-inverting input and the phase-shift of the twin-T filter. Built in regulated power supply: + 15V/300mA Input Supply: 230 VAC/50Hz mains operated. Dimension: 27cms x 17cms x 10cms. Weight: 500gms See Enlarge Click to Enlarge BEAT FREQUENCY OSCILLATOR (BFO) AND DETECTOR Objectives of this experiment: In a communication system when receiving carrier wave it is necessary to mix the IF Signal appearing at the demodulator with another oscillator to produce an A. F. beat note. To test the beat frequency oscillator FX & FY are the two different inputs. Keep FX as a fixed frequency and vary the frequency of FY. You will get the difference of frequencies at the output of the mixer. The mixer output F(X-Y) is connected to the amplifier. Built in regulated power supply: +15V/300mA Input Supply: 230 VAC/50Hz mains operated. Dimension: 27cms x 17cms x 10cms. Weight: 500gms See Enlarge Click to Enlarge VOLTAGE CONTROLLED OSCILLATOR Objectives of this experiment: To construct voltage oscillator trainer and verify the frequency variations in accordance with input voltage. Built in regulated power supply: +5V/300mA Input Supply: 230 VAC/50Hz mains operated. Dimension: 27cms x 17cms x 10cms. Weight: 500gms See Enlarge Click to Enlarge BLOCKING OSCILLATOR Objectives of this experiment:- To obtain different waveforms sawtooth, sync pulse at different points. The frequency of the waveforms can be varied by different values of capacitors. Built in regulated power supply: + 15V/300mA Input Supply: 230 VAC/50Hz mains operated. Dimension: 27cms x 17cms x 10cms. Weight: 500gms See Enlarge Click to Enlarge CLAPP OSCILLATOR Objectives of this experiment: To construct clapp oscillator and determine oscillator stability. Built in regulated power supply: +15V/300mA Input Supply: 230 VAC/50Hz mains operated. Dimension: 27cms x 17cms x 10cms. Weight: 500gms See Enlarge Click to Enlarge OSCILLATOR BUILDING BLOCKS Objectives of this experiment: This trainer demonstrator the three basic multivibrator circuits (i.e.) mono, Astable and bistable. This trainer is provided with LED's to demonstrate each one of them. See Enlarge [1] Go to Top