Digital Servo Single Chip Processor Built in 1 Bit DA Converter

The TC9495F is a single chip processor which incorporates the following function: synchronous separation protection and interpolation, EFM demodulation, Error correction, micro controller interface, digital equalizer for use in servo LSI and servo control circuit.

In addition, the TC9495F incorporates a 1 bit DA converter. In combination with the head amplifier TA2109F, TA2150FN, TA2153FN for digital servo, the TC9495F allow simplified, adjustment-free structuring of CD player system.

特性 Features

? Capable of decode the text data.

? Sync pattern detection, sync signal protection and synchronization can be made correctly.

? Built in EFM demodulation circuit, subcode demodulation circuit.

? Capable of correcting dual C1 correction and quadruple C2 correction using the CIRC correction theoretical format.

? The TC9495F respond to variable playback system.

? Jitter absorbing capacity of ±6 frames.

? Built in 16 KB RAM.

? Built in digital out circuit.

? Built in L/R independent digital attenuator.

? Audio output responds to bilingual function.

? Reed timing free subcode Q data and capable of synchronous output with audio data.

? Built in data slicer and analog PLL (free-adjustment VCO).

? Capable of automatic adjustment function of focus servo and tracking servo, for loop gain, offset and balance.

? Built in RF gain automatic adjustment circuit.

? Built in digital equalizer for phase compensation.

? Built in RAM for digital equalizer for coefficient, and capable of variable pickup.

? Built in focus, tracking servo control circuit.

? Search control corresponds to every mode and can realize high speed and stable search.

? Lens-kick and feed-kick are using speed controlled form.

? Built in AFC circuit and APC circuit for CLV servo of disc motor.

? Built in anti-defect and anti-shock circuit.

? Built in 8 times over sampling digital filter and 1 bit DA converter.

? Built in analog filter for 1 bit DA converter.

? Output format for audio out can be selected 32 fs, 48 fs, or 64 fs modes.

? Built in zero data detect output circuit.

? The TC9495F capable of 4 times speed operation.

? Built in micro controller interface circuit.

? CMOS silicon structure and high speed, low power consumption.

? 100 pin flat package.