FAQs | PSD circuits

What type of power supplies should be used with a PSD signal processing circuit?

On the C3683-02: Use a dual output power supply that can be set to Vout=±15 V and has a current capacity of Iout=100 mA. Also use a power supply whose ripple voltage is ±3 mVp-p or lower to suppress power supply noise.

Recommended power supplies
*PW18-3AD (TEXIO)

I can't connect a PSD to the PSD signal processing circuit. Any advice?

The PSD signal processing circuit has through-holes for externally connecting a PSD. Solder the leads or shield wires to connect between the PSD terminals and through-hole terminals. Using shielded wires is recommended to reduce effects from noise.

Can PSD signal processing circuits be used in combination with a dual or quadrant photodiode?

The PSD signal processing circuit C3683-02 is compatible with a multi-element photodiode. Please contact us for details on compatible elements.

Note that normal output is provided only when light is incident on all elements of the segmented photodiode (2 elements).

Can the repetition frequency and duty ratio of AC type PSD signal processing circuits (C5923) be changed?

The repetition frequency and duty ratio cannot be changed in either of these circuits.

Can the gain of PSD signal processing circuits be changed?

On the C3683-02: The gain can be changed just by replacing the feedback resistor and capacitor inserted in the first stage amp's socket.

Can DC type PSD signal processing circuits be used with pulsed light input?

On the C3683-02:
Cannot be used with pulsed light. When pulsed light is off, the divider IC within the PSD signal processing circuit issues an error,
and outputs a random value within the supply voltage range (±15 V).

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