DATASHEET and Circuit Diagram

The following semiconductor article reviews how to design RF Circuits – Oscillators which is concentrated on a worked example of a Clapp oscillator, using a varactor tuned ceramic coaxial resonator for voltage control of the output frequency. This circuit used to be applied at Plextek in Satellite Digital Audio Broadcasting circuits, and in telemetry links for Formula One racing cars.

What you will see in the depth of the article are sections such as General Equivalent Circuits for RF Oscillators, Schematic for Small-Signal Oscillator Design, Small-Signal Negative Resistance Simulation, Schematic for Large-Signal Oscillator Design, Large-Signal Oscillator Phase Noise Simulation and more.

Learning How to Design Oscillator – RF Circuits continued »

The schematic below appears typical stepper motor driver application with NJM3770A. As seen in the diagram, the single channel stepper motor drivers NJM3717 and NJM3770A are not synchronized.

It such PWM switching of one channel is totally independent of the other channel. Sometimes switching of the two channels may cause audible noise and vibrations from the motor.

Synchronizing NJM3770A Stepper Motor Driver Circuit Diagram continued »

The herein article contains information related on the method of closed loop control with a sensor and an actuator and how to apply the method to build a rudimentary On/Off heater controller (On/Off Temperature Control). The semiconductor components used to build this control circuit are thermistor, Zener diode, LED, relay, op-amp, and bipolar transistor.

Sections describe in this article are such essential elements of the control circuit, basic thermistor sensing circuit (using an op-amp without feedback as a comparator), thermistor sensing circuit using 2N222 transistor with 4 and output driver stage added, controlling a real actuator with a relay, and then finalising the circuit and improving the stability with Schmitt Trigger.

Closed Loop Control Circuit using Sensor and Actuator continued »

The following document contains information related to Volvo 440 electrical installation schematic diagram. It such the wiring schematic for Volvo 440, 460, and 480 series.

What you will find in the depth of the document are the typical wiring diagram for 1991 Volvo 440/460 models, wiring diagram for the B18E/B18F/B18FT/ Engine of the same vehicle, anti-lock braking system (ABS) wiring diagram for the 1991 and 1992 440/480 models, the typical wiring of 1992 440/480 models and etc.

1991 Volvo 440 Electrical Wiring Schematic Diagram continued »

ICL7135 Typical Application Schematic Diagram appears in the following circuit illustration. This A/D (Analog to Digital) converter with all necessary active devices are contained on a single CMOS IC such multiplexed BCD output and digit drivers.

Since it has several pins such STROBE, OVERRANGE, RUN/HOLD and BUSY lines, this device is possible to interface the circuit to a microprocessor or UART.

ICL7135 Typical Application Schematic Diagram and Datasheet continued »

CD4093BC Quad 2-Input NAND Schmitt Trigger Connection Diagram appears in the following circuit schematic. The device consists of four Schmitt-trigger circuits with each functions as a 2-input NAND gate with Schmitt-trigger action on both inputs.

According to the CD4093BC datasheet, this device used to be applied in applications such as Wave and pulse shapers, High-noise-environment systems, Monostable/Astable multivibrators, and NAND logic.

CD4093BC Connection Diagram and Datasheet continued »