The 1SV308(TH3,T) is a silicon epitaxial planar type variable capacitance diode (Varicap) manufactured by Toshiba Semiconductor and Storage. This diode is specifically designed for use in electronic tuning applications, offering excellent capacitance variation with reverse voltage.

Applications

• Electronic tuning circuits in radios and televisions
• Voltage-controlled oscillators (VCOs)
• Frequency modulators
• Automatic frequency control (AFC) circuits
• Parametric amplifiers

Features

• High capacitance ratio: Provides a wide tuning range.
• Low series resistance: Ensures minimal signal loss.
• Excellent linearity: Offers stable and predictable performance across the voltage range.
• Small package size: Suitable for compact circuit designs.
• Epitaxial planar structure: Delivers high reliability and uniformity.

Benefits

• Precise tuning: Enables accurate selection of desired frequencies.
• Stable oscillation: Maintains consistent performance in VCO applications.
• Efficient frequency modulation: Facilitates clear and reliable signal transmission.
• Improved receiver sensitivity: Enhances the ability to detect weak signals.
• Reduced component count: Simplifies circuit design and lowers overall cost.

Additional Details

The 1SV308(TH3,T) is characterized by its capacitance variation with reverse voltage. The capacitance typically ranges from a maximum value at a low reverse voltage to a minimum value at a higher reverse voltage. This characteristic is critical for tuning applications where the diode's capacitance is used to adjust the resonant frequency of a circuit.

The forward voltage is typically around 1V, and the reverse voltage can withstand up to a specified maximum value, usually around 15V. The operating temperature range is typically from -40°C to +85°C. The device comes in a small surface-mount package, allowing for high-density circuit board designs.

When using the 1SV308(TH3,T) in a circuit, it's important to consider the impedance matching and biasing conditions to achieve optimal performance. Careful design considerations will ensure the diode operates within its specified parameters and delivers the desired tuning characteristics.